Ratings
KOZUKA Katsuhiko (Japan)
Japanese name(s): 小塚勝彦104 tournaments
611 results
Player ID: 601
Rated T104 in Japan and T119 in Asia&Oceania&Africa and T132 in the World
Latest rating: 2186
611 results
Player ID: 601
Rated T104 in Japan and T119 in Asia&Oceania&Africa and T132 in the World
Latest rating: 2186
- 2024
- 2022
- 2021
- 2019
- 2017
- 2016
- 2015
- 2014
- 2013
- 2012
- 2011
- 2010
- 2009
- 2008
- 2007
- 2006
- 2005
- 2004
- 1994
- 1993
- 1992
- 1991
2024-05-03: 100_Hamamatsu_meeting(Japan)
| KOZUKA Katsuhiko | 42-22 | MATSUSHITA Shigeo |
| NAGAO Hiroto | 37-27 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 63-01 | MATSUSHITA Shigehiro |
| KOZUKA Katsuhiko | 41-23 | HASEGAWA Takeshi |
| KOZUKA Katsuhiko | 62-02 | MATSUMOTO Kuichi |
| KOZUKA Katsuhiko | 35-29 | OKUDAIRA Fuyumi |
2022-05-04: 50_blue_sky_conf(Japan)
| KOZUKA Katsuhiko | 64-00 | OTA Tokiko |
| OHMORI Keita | 40-24 | KOZUKA Katsuhiko |
| TAKAHASHI Hisashi | 41-23 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 54-10 | KOBAYASHI Manabu |
| MARUYAMA Tomohiro | 42-22 | KOZUKA Katsuhiko |
2021-12-25: Tokai_year_end(Japan)
| KOZUKA Katsuhiko | won against | OHMORI Keita |
| HATTORI Kouki | 33-31 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 55-09 | ONO Taiga |
| OKUDAIRA Fuyumi | 40-24 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 38-26 | OKUDAIRA Akio |
2019-09-01: 60_Nagoya_open(Japan)
| MATSUMOTO Hiroyuki | 34-30 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 37-27 | YAMANAKA Yukihiro |
| KOZUKA Katsuhiko | 44-20 | ISHIBARA Kotaro |
| KOZUKA Katsuhiko | 43-21 | HATTORI Kouki |
| KOZUKA Katsuhiko | 38-26 | YOSHIDA Takuma |
| MIYAGAWA Keigo | 40-24 | KOZUKA Katsuhiko |
2017-05-04: 47_Blue_Sky_conf(Japan)
| KOZUKA Katsuhiko | 57-07 | OHMORI Keita |
| OHMORI Keita | 55-09 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 34-30 | IWASAKI Masaaki |
| IWASAKI Masaaki | 44-20 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 36-28 | YUKA Takaaki |
| YUKA Takaaki | 52-12 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 56-08 | MUKAI Daisuke |
| MUKAI Daisuke | 47-17 | KOZUKA Katsuhiko |
2016-05-14: 106_Chiyarenshi_open(Japan)
2016-03-20: 37_Meijin(Japan)
2016-03-12: 105_Chiyarenshi_open(Japan)
2016-01-16: 103_Chiyarenshi_open(Japan)
| HISHIYAMA Yuichi | 33-31 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 44-20 | NAMIKI Kazunari |
| KIYONOBU Kenta | 56-08 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 40-24 | KANEKO Kodai |
| KOZUKA Katsuhiko | 54-10 | TANIDA Kunihiko |
| NAKAJIMA Tetsuya | 50-14 | KOZUKA Katsuhiko |
| NARUMI Hisatoshi | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | won against | YOSHIYUKI Suganuma |
| MIURA Toshie | won against | KOZUKA Katsuhiko |
| YAMAMOTO Takashi | won against | KOZUKA Katsuhiko |
| KUNOU Masakado | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | won against | OTSUKA Yu |
| KOZUKA Katsuhiko | won against | LEE Chunae |
| KOZUKA Katsuhiko | 35-29 | NAGAMATSU Ryota |
| TAMAKI Kyotaro | 40-24 | KOZUKA Katsuhiko |
| KITANO Ochachi | 34-30 | KOZUKA Katsuhiko |
| AKAGI Tachiro | 38-26 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 34-30 | HISHIYAMA Yuichi |
| MITSUYA Nobuaki | 38-26 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 34-30 | TATSUMI-IIJIMA Yukiko |
| KOZUKA Katsuhiko | 42-22 | HISHIYAMA Yuichi |
| NAGANO Yasushi | 41-23 | KOZUKA Katsuhiko |
| URANO Kento | 49-15 | KOZUKA Katsuhiko |
| TSUCHIYA Ryosuke | 39-25 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 40-24 | KURAHASHI Satoshi |
2015-11-14: 101_Chiyarenshi_open(Japan)
2015-09-22: 1_Iwata_endurance_open_1(Japan)
2015-09-22: 1_Iwata_endurance_open_2(Japan)
2015-09-12: 99_Chiyarenshi_open(Japan)
2015-08-08: 98_Chiyarenshi_open(Japan)
2015-07-11: 97_Chiyarenshi_open(Japan)
2015-04-26: 45_Blue_Sky_conference(Japan)
| KOZUKA Katsuhiko | 34-30 | KURIHARA Aru |
| NAKAJIMA Tetsuya | 39-25 | KOZUKA Katsuhiko |
| HISHIYAMA Yuichi | 35-29 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 34-30 | TATSUMI-IIJIMA Yukiko |
| URANO Kento | 36-28 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 37-27 | TAKAHASHI Hisashi |
| KOZUKA Katsuhiko | 33-31 | TAKANASHI Yusuke |
| KOZUKA Katsuhiko | 38-26 | YOSHIYUKI Suganuma |
| DATE Yuji | 36-28 | KOZUKA Katsuhiko |
| OHTSUBO Hidetaka | 43-21 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 60-04 | FUJITA Koichi |
| KOZUKA Katsuhiko | 50-14 | FUJITA Koichi |
| TOMOTA Yusuke | 33-31 | KOZUKA Katsuhiko |
| FUJITA Takeshi | 35-29 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 37-27 | MIZUNO Keigo |
| KOZUKA Katsuhiko | 36-28 | YOSHIYUKI Suganuma |
| KOZUKA Katsuhiko | 33-31 | TAKAHASHI Hisashi |
| KAMIKURA Daisuke | 35-29 | KOZUKA Katsuhiko |
| TAMAKI Kyotaro | 33-31 | KOZUKA Katsuhiko |
| SUEKUNI Makoto | 37-27 | KOZUKA Katsuhiko |
| KURIHARA Aru | 36-28 | KOZUKA Katsuhiko |
| KAMIKURA Daisuke | 35-29 | KOZUKA Katsuhiko |
| TATSUMI-IIJIMA Yukiko | 34-30 | KOZUKA Katsuhiko |
| TANIDA Kunihiko | 33-31 | KOZUKA Katsuhiko |
| NISHIO Hakudo | 34-30 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 36-28 | SANO Yoko |
| KOZUKA Katsuhiko | 38-26 | KURIHARA Aru |
| NAKANO Jo | 36-28 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 37-27 | TAKAHASHI Hisashi |
| NAKAJIMA Tetsuya | 35-29 | KOZUKA Katsuhiko |
| SOUDA Shun | 41-23 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 37-27 | TAKIGAWA Mitsuaki |
| KOZUKA Katsuhiko | 64-00 | ARIBA Rieko |
| OHMORI Keita | 41-23 | KOZUKA Katsuhiko |
| ARAKI Yasuyuki | 41-23 | KOZUKA Katsuhiko |
| NAMIKI Kazunari | 33-31 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 57-07 | YUKA Takaaki |
| MUKAI Daisuke | 33-31 | KOZUKA Katsuhiko |
2014-07-13: 42_All_Japan_open_championship(Japan)
2014-06-08: 42_All_Japan_Tokyo_prelim_2(Japan)
2014-06-01: 42_All_Japan_Tokyo_prelim_1(Japan)
2014-04-27: 44_Blue_sky_conference(Japan)
| TSUKAMOTO Kazuma | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | won against | TANAKA Atsushi |
| KOZUKA Katsuhiko | won against | SANO Hirotaka |
| ITO Junya | won against | KOZUKA Katsuhiko |
| TAKIZAWA Nobuyuki | won against | KOZUKA Katsuhiko |
| OHNO Tomohiro | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 34-30 | TAKAHASHI Hisashi |
| KOZUKA Katsuhiko | 37-27 | NAKAZAWA Junichi |
| FURUMOTO Yuki | 33-31 | KOZUKA Katsuhiko |
| HISHIYAMA Yuichi | 35-29 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 43-21 | MABUCHI Yuta |
| KOZUKA Katsuhiko | 34-30 | IWAKURA Hiroaki |
| TAKAHASHI Hisashi | 35-29 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 40-24 | NAKAZAWA Junichi |
| SAITO Riki | 34-30 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 34-30 | WATANABE Keiichi |
| TANAKA Shuntaro | 33-31 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 40-24 | OKAMA Ayumi |
| KOZUKA Katsuhiko | 37-27 | OHE Yoshimaru |
| MATSUMOTO Hiroyuki | 37-27 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 34-30 | KOUKAWA Satoshi |
| KOZUKA Katsuhiko | 39-25 | HASEGAWA Toshi |
| KOZUKA Katsuhiko | 34-30 | ARAKI Yasuyuki |
| IWASAKI Masaaki | 35-29 | KOZUKA Katsuhiko |
2013-08-11: 81_Hamamatsu_meeting(Japan)
2013-07-14: 41_All_Japan_championship(Japan)
2013-06-02: 41_All_Japan_Tokyo_prelim_2(Japan)
2013-03-31: 34_Meijin(Japan)
2013-02-16: 2013_Tokyo_expert_games(Japan)
2013-01-24 → 2013-01-27: Othello World Cup(World)
2013-01-13: 144_Nagareyama_open(Japan)
2013-01-03: Shinagawa_open_2013(Japan)
| KOZUKA Katsuhiko | 34-30 | YOSHIYUKI Suganuma |
| TANAKA Atsushi | 38-26 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 38-26 | TAKIGAWA Mitsuaki |
| SAKURAI Yuka | 32-32 | KOZUKA Katsuhiko |
| FUJITA Takeshi | 40-24 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | won against | KAWAKI Matruko |
| KOZUKA Katsuhiko | won against | NAKANO Jo |
| AKAGI Tachiro | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | won against | KOSHINO Kazuhiko |
| YOSHIYUKI Suganuma | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | won against | KOYAMA Kotoe |
| KOZUKA Katsuhiko | 35-29 | IMOTO Wataru |
| KOZUKA Katsuhiko | 41-23 | MATSUDA Shoma |
| KIMURA Yuto | 33-31 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 33-31 | IWAKURA Hiroaki |
| ISHIKAWA Akira | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 39-25 | TASAKA Kanichiro |
| NAGASHIMA Kazuhito | won against | KOZUKA Katsuhiko |
| TOKI Yugo | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | won against | HAYASAKA Toshie |
| GOTO Masahiro | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | won against | ASAKAWA Takuya |
| SATO Hisakazu | won against | KOZUKA Katsuhiko |
| HAYASHI Taka | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 35-29 | TAKAHASHI Hisashi |
| NAKAJIMA Tetsuya | 47-17 | KOZUKA Katsuhiko |
| DELAUNAY Arnaud | won against | KOZUKA Katsuhiko |
| SONG Yan | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | won against | MARCONI Francesco |
| KOZUKA Katsuhiko | won against | TSOI Chun Yip |
| KOZUKA Katsuhiko | won against | KANG Le |
| KOZUKA Katsuhiko | won against | DONG Zhen |
| KOZUKA Katsuhiko | won against | HAYASAKA Toshie |
| KOZUKA Katsuhiko | won against | WILLIAM Joanna |
| KOZUKA Katsuhiko | won against | ODEGARD Martin |
| KOZUKA Katsuhiko | won against | KURITA Seiya |
| KASHIWABARA Takuji | won against | KOZUKA Katsuhiko |
| SURY Bartlomiej | won against | KOZUKA Katsuhiko |
| ROSE Brian | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 42-22 | OHMORI Keita |
| NAGAO Hiroto | 45-19 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 40-24 | KURAHASHI Satoshi |
| MITSUYA Nobuaki | 45-19 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 54-10 | SHINAGAWA Yukinobu |
| KOZUKA Katsuhiko | 34-30 | IWATA Hiroyuki |
| MIYAZAKI Yuji | 39-25 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 44-20 | OHTSUBO Masayuki |
| HISHIYAMA Yuichi | 38-26 | KOZUKA Katsuhiko |
| TAKAHASHI Shiu | 33-31 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 38-26 | MATSUMOTO Makoto |
| KOZUKA Katsuhiko | 40-24 | TAKAHASHI Kenji |
| TATSUMI-IIJIMA Yukiko | 41-23 | KOZUKA Katsuhiko |
2012-12-08: 79_Chiyarenshi_open(Japan)
2012-11-11: OWC2013_qualification(Japan)
2012-07-18: 40_All_Japan_open_champ(Japan)
2012-06-24: 40_All_Japan_Tokyo_prelim_2(Japan)
2012-06-17: 40_All_Japan_Tokyo_prelim(Japan)
2012-03-18: 137_Nagareyama_open(Japan)
| KOIDE Satoshi | 35-29 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 35-29 | TATSUMI-IIJIMA Yukiko |
| TOKI Yugo | 36-28 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 33-31 | NAGASHIMA Kazuhito |
| NAKAJIMA Tetsuya | 36-28 | KOZUKA Katsuhiko |
| MURAKAMI Takeshi | 34-30 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | won against | TAKIGAWA Mitsuaki |
| KOZUKA Katsuhiko | won against | OHTAKE Kosuke |
| TODA Tomoya | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | won against | TSUCHIDA Daisuke |
| KOZUKA Katsuhiko | won against | IKEDA Yuki |
| KOZUKA Katsuhiko | won against | KAMIKURA Daisuke |
| KOZUKA Katsuhiko | won against | IWATA Hiroyuki |
| KOZUKA Katsuhiko | won against | OZAKI Yoshito |
| KIMURA Yuto | won against | KOZUKA Katsuhiko |
| KANAZAWA Kota | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | won against | SUGIYAMA Mitsuaki |
| KOZUKA Katsuhiko | won against | YOSHIDA Taisaku |
| OSHIMA Yusuke | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 37-27 | SHINOHARA Chiaki |
| KOZUKA Katsuhiko | 40-24 | KOSHINO Kazuhiko |
| KOZUKA Katsuhiko | 38-26 | KOIDE Satoshi |
| KOZUKA Katsuhiko | 35-29 | NAGAMATSU Ryota |
| ASOU Daisuke | 33-31 | KOZUKA Katsuhiko |
| SHIROTA Yasuto | 36-28 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 40-24 | SHIRAI Ukyo |
| KOZUKA Katsuhiko | 35-29 | TAKAHASHI Hisashi |
| KANEDA Shigeru | 35-29 | KOZUKA Katsuhiko |
| NAKANO Jo | 33-31 | KOZUKA Katsuhiko |
| TSUKAMOTO Kazuma | 37-26 | KOZUKA Katsuhiko |
| TASAKA Kanichiro | 35-29 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 38-26 | TAKAHASHI Shiu |
| KOZUKA Katsuhiko | 33-31 | MABUCHI Yuta |
| NARUMI Hisatoshi | 45-19 | KOZUKA Katsuhiko |
| IWATA Hiroyuki | 34-30 | KOZUKA Katsuhiko |
| TAKAHASHI Hisashi | 42-22 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 39-25 | TANAKA Atsushi |
2011-08-14: 75_Hamamatsu_meeting(Japan)
2011-07-17: 39_Japan_Champ(Japan)
2011-06-26: 39_Japan_Champ_Kyoto_prelim(Japan)
2011-06-12: 39_Japan_champ_Tokyo_prelim(Japan)
2011-05-29: 32_Meijin(Japan)
2011-05-15: 131_Nagareyama_open(Japan)
2011-04-29: 24_Kanto_social_choosing(Japan)
2011-03-05: 75_Shinagawa_open(Japan)
2011-01-30: Tokyo_expert_games(Japan)
| FUJITA Takeshi | 36-28 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 60-04 | YUKA Takaaki |
| KOZUKA Katsuhiko | 45-19 | MUKAI Daisuke |
| TOMOTA Yusuke | 42-22 | KOZUKA Katsuhiko |
| KURODA Takuji | 34-30 | KOZUKA Katsuhiko |
| YOSHIYUKI Suganuma | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | won against | WATANABE Keiichi |
| KOZUKA Katsuhiko | won against | TAKAHASHI Hisashi |
| ENOMOTO Hiroyuki | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | won against | IWAKURA Hiroaki |
| KOZUKA Katsuhiko | won against | SUGIYAMA Tomoyuki |
| KOZUKA Katsuhiko | 34-30 | KOIDE Satoshi |
| NAGAMATSU Ryota | 38-26 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | won against | TANAKA Irie |
| KOZUKA Katsuhiko | 34-30 | ASOU Daisuke |
| KOZUKA Katsuhiko | 34-30 | SHINOHARA Chiaki |
| IIJIMA Takamune | 36-28 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 36-28 | YOSHIKAWA Takeshi |
| KOZUKA Katsuhiko | 34-30 | SAKAGUCHI Kazuhiro |
| MURAKAMI Takeshi | 37-27 | KOZUKA Katsuhiko |
| TAKAHASHI Hisashi | 33-30 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 44-20 | KANEKO Kodai |
| KOZUKA Katsuhiko | 33-31 | ASAHINA Satoshi |
| KOZUKA Katsuhiko | won against | TATENO Ryuuji |
| TAKIZAWA Nobuyuki | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | won against | TAKAHASHI Hisashi |
| TAKANASHI Yusuke | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | won against | KAGAWA Yoichi |
| NAGANO Yasushi | won against | KOZUKA Katsuhiko |
| KOSHINO Kazuhiko | 37-27 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 57-07 | TASAKA Kanichiro |
| KOZUKA Katsuhiko | 46-18 | HONMA Yosuke |
| KOZUKA Katsuhiko | 38-26 | SATO Takumi |
| ASAHINA Satoshi | 36-28 | KOZUKA Katsuhiko |
| ISHIKAWA Akira | 34-30 | KOZUKA Katsuhiko |
| KOMAGATA Masayuki | 35-29 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 37-27 | NISHIYAMA Yuki |
| KOZUKA Katsuhiko | 44-20 | TAKEDA Kyoko |
| KOZUKA Katsuhiko | 38-26 | KOBAYASHI Manabu |
| KOZUKA Katsuhiko | 33-31 | AIHARA Shigeaki |
| TAKAHASHI Hisashi | 34-30 | KOZUKA Katsuhiko |
| HAGIKURA Yutaka | 34-30 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 33-31 | ISHIKAWA Akira |
| KOZUKA Katsuhiko | 44-20 | AKAIKE Hide |
| KOZUKA Katsuhiko | 38-26 | NAGASHIMA Kazuhito |
| KOZUKA Katsuhiko | 43-21 | SATO Koichiro |
| AKASHI Tomone | 38-26 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 41-23 | SHIMONOSONO Kozo |
| TOKI Yugo | 41-23 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 40-24 | WATANABE Keiichi |
| KOSHINO Kazuhiko | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 44-20 | TOKI Hidenobu |
2010-11-20: 49_King_state(Japan)
2010-09-18: 47_King_State(Japan)
2010-08-15: 72_Hamamatsu_meeting(Japan)
2010-08-07: 69_Shinagawa_open(Japan)
2010-07-24: 40_King_State(Japan)
2010-07-18: CH_Japan(Japan)
2010-06-27: 38_Japan_Champ_Tokyo_prelim_2(Japan)
2010-06-13: 38_Japan_Champ_Tokyo_prelim_1(Japan)
2010-04-29: 23_Kanto_social_choosing_prelim(Japan)
2010-03-21: 31_Meijin(Japan)
2010-02-20: 42_King_state(Japan)
| KOZUKA Katsuhiko | 37-27 | OHTAKE Kosuke |
| NAKAJIMA Tetsuya | 34-30 | KOZUKA Katsuhiko |
| IWATA Hiroyuki | 37-27 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 38-26 | ITO Junya |
| KOIDE Satoshi | 34-30 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 37-27 | NAKAMORI Chiaki |
| KOZUKA Katsuhiko | 33-31 | WAKIMOTO Naoyuki |
| SAITO Riki | 36-28 | KOZUKA Katsuhiko |
| KOSHINO Kazuhiko | 38-26 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 34-30 | ISHIKAWA Akira |
| KOZUKA Katsuhiko | 34-30 | IWAKURA Hiroaki |
| TAKANASHI Yusuke | 36-28 | KOZUKA Katsuhiko |
| SANO Hirotaka | 42-22 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 53-11 | MUKAI Daisuke |
| KOZUKA Katsuhiko | 48-16 | ARAKI Yasuyuki |
| TOMOTA Yusuke | 37-27 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 33-31 | IZUMI Shinichi |
| KOZUKA Katsuhiko | 39-25 | TAKIGAWA Mitsuaki |
| NAGASAKI Hidekazu | 38-26 | KOZUKA Katsuhiko |
| KIUCHI Hideyuki | 35-29 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 43-20 | TETSUHIRO Osawa |
| KOZUKA Katsuhiko | 36-28 | SANO Joichiro |
| SATO Koichiro | 34-30 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 34-30 | ISHIKAWA Akira |
| KOZUKA Katsuhiko | 36-28 | TATSUMI-IIJIMA Yukiko |
| WATANABE Keiichi | 38-25 | KOZUKA Katsuhiko |
| NAGASHIMA Kazuhito | 35-29 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 44-20 | IWAKURA Hiroaki |
| KOZUKA Katsuhiko | 44-20 | KURACHI Takayuki |
| KOZUKA Katsuhiko | won against | HADA Jun |
| KOZUKA Katsuhiko | won against | WATANABE Keiichi |
| MITSUYA Nobuaki | won against | KOZUKA Katsuhiko |
| ASOU Daisuke | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | won against | ISHII Kiyotaka |
| TSUCHIYA Keishiro | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 33-31 | SHIROTA Yasuto |
| KOMAGATA Masayuki | 34-30 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 37-27 | KOSHINO Kazuhiko |
| YAMADA Goro | 39-25 | KOZUKA Katsuhiko |
| KATO Yuzuru | 34-30 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 45-19 | SHINOHARA Chiaki |
| KOZUKA Katsuhiko | 41-23 | SATO Yutaka |
| KOZUKA Katsuhiko | 33-31 | TAKASHIMA Ryoji |
| NAGASAKI Hidekazu | 45-19 | KOZUKA Katsuhiko |
| IIJIMA Takamune | 36-28 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 40-24 | KOSHINO Kazuhiko |
| KOZUKA Katsuhiko | 34-30 | KOBAYASHI Manabu |
| KOZUKA Katsuhiko | 36-28 | MATSUYA Shinpei |
| KOZUKA Katsuhiko | 40-24 | NAGASAKI Hidekazu |
| NAKAJIMA Tetsuya | 37-27 | KOZUKA Katsuhiko |
| IWATA Hiroyuki | 32-32 | KOZUKA Katsuhiko |
| ISHIKAWA Akira | 38-26 | KOZUKA Katsuhiko |
| IZUMI Takashi | 64-00 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 64-00 | NAGAMATSU Ryota |
| KOZUKA Katsuhiko | 64-00 | KURODA Takuji |
| ITAGAKI Kenichi | 64-00 | KOZUKA Katsuhiko |
| SHINOHARA Chiaki | 64-00 | KOZUKA Katsuhiko |
| ENOMOTO Hiroyuki | 64-00 | KOZUKA Katsuhiko |
| MATSUYA Shinpei | 36-28 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 43-21 | IIJIMA Takamune |
| NAKAJIMA Tetsuya | 35-29 | KOZUKA Katsuhiko |
| WATAHIKI Kenta | 34-30 | KOZUKA Katsuhiko |
| SANO Yoko | 40-24 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 64-00 | TAKAHASHI Kanji |
2009-12-26: Shinagawa_open_2009(Japan)
2009-10-12: 7_Inuyama_open(Japan)
2009-09-06: 4_Ouza_sen(Japan)
2009-08-29: 35_King_State(Japan)
2009-08-09: 6_Inuyama_open(Japan)
2009-07-19: 37_Japan_Open_Champ(Japan)
2009-07-12: 114_Nagareyama_Open(Japan)
2009-06-28: 37_Japan_Champ_Tokyo_prelim(Japan)
2009-06-14: Amumazeki_Open(Japan)
2009-05-31: 5_Inuyama_Open(Japan)
2009-03-29: 30_Meijin(Japan)
2009-03-15: 2009_Tokyo_Expert_Prelim(Japan)
2009-03-15: 2009_Tokyo_Expert_PrelimFinals_A(Japan)
2009-02-15: 4_Shinagawa_Open(Japan)
| ITO Junya | 34-30 | KOZUKA Katsuhiko |
| NAGANO Yasushi | 34-30 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 47-17 | ISHIKAWA Akira |
| KOZUKA Katsuhiko | 36-28 | ITO Junya |
| YAMAKAWA Takashi | 34-30 | KOZUKA Katsuhiko |
| NAGASHIMA Kazuhito | 35-29 | KOZUKA Katsuhiko |
| AKASHI Tomone | 37-27 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 37-27 | KURAMOCHI Yuta |
| KOZUKA Katsuhiko | 40-24 | TAKANO-TSUJI Toshimi |
| KURITA Seiya | 38-26 | KOZUKA Katsuhiko |
| KITAJIMA Hideki | 32-32 | KOZUKA Katsuhiko |
| SASAKI Sohei | 35-29 | KOZUKA Katsuhiko |
| TAKEISHI Takuya | 40-24 | KOZUKA Katsuhiko |
| KOMAGATA Masayuki | 36-28 | KOZUKA Katsuhiko |
| TAGUCHI Ryosuke | 34-30 | KOZUKA Katsuhiko |
| KOIDE Satoshi | 35-29 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 39-25 | ISHIKAWA Akira |
| KOZUKA Katsuhiko | 37-27 | SATO Ryu |
| KOZUKA Katsuhiko | 40-24 | KOBAYASHI Manabu |
| NAKAJIMA Tetsuya | 36-28 | KOZUKA Katsuhiko |
| NAGANO Yasushi | 35-29 | KOZUKA Katsuhiko |
| MURAKAMI Takeshi | won against | KOZUKA Katsuhiko |
| NAGASHIMA Kazuhito | 37-27 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 38-26 | ISHIKAWA Akira |
| NAGASAKI Hidekazu | 36-28 | KOZUKA Katsuhiko |
| HAGIKURA Yutaka | 36-28 | KOZUKA Katsuhiko |
| SUZUKI Yuta | 34-30 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | won against | MUKAI Daisuke |
| KOZUKA Katsuhiko | won against | KAWABATA Seiji |
| KOZUKA Katsuhiko | won against | OHMORI Keita |
| KOZUKA Katsuhiko | won against | KOUKAWA Satoshi |
| SATO Hisakazu | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | won against | ISHIZAKI Hikaru |
| KOBAYASHI Manabu | 34-30 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 34-30 | HISHIYAMA Yuichi |
| KOZUKA Katsuhiko | 34-30 | WATAHIKI Kenta |
| KOZUKA Katsuhiko | 53-11 | MIYASHITA Naoto |
| NAGAO Hiroto | 33-31 | KOZUKA Katsuhiko |
| SATO Naohiro | 42-22 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 34-30 | SHINOHARA Chiaki |
| KOZUKA Katsuhiko | 34-30 | SUKO Masayuki |
| SATO Koichiro | 35-29 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 41-23 | WATANABE Hideaki |
| KOZUKA Katsuhiko | 35-29 | KOBAYASHI Oh |
| KOZUKA Katsuhiko | won against | SATO Koichiro |
| KOZUKA Katsuhiko | 36-28 | SATO Naohiro |
| KOZUKA Katsuhiko | 42-22 | SANO Joichiro |
| ENOMOTO Yasuhiro | 36-28 | KOZUKA Katsuhiko |
| FURUMOTO Yuki | 34-30 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 34-30 | NAKANO Jo |
| TANAKA Irie | 39-25 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 41-23 | SAKA Hiroshi |
| KOZUKA Katsuhiko | won against | NAGANO Yasushi |
| WATAHIKI Kenta | 34-30 | KOZUKA Katsuhiko |
| NAKAJIMA Tetsuya | 39-24 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 40-24 | SUZUKI Yuta |
| MURAKAMI Takeshi | 37-27 | KOZUKA Katsuhiko |
| SATO Koichiro | 38-26 | KOZUKA Katsuhiko |
| MATSUZAWA Atsushi | 33-31 | KOZUKA Katsuhiko |
| MIYAOKA Tamaki | 33-31 | KOZUKA Katsuhiko |
| MURAKAMI Takeshi | 33-31 | KOZUKA Katsuhiko |
| IWASAKI Masaaki | 33-31 | KOZUKA Katsuhiko |
| MATSUMOTO Hiroyuki | 33-31 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 33-31 | OHNO Daisuke |
| KOZUKA Katsuhiko | 41-23 | KOIDE Satoshi |
| WATAHIKI Kenta | 38-26 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 49-15 | ARAKI Kentaro |
| MURAKAMI Takeshi | 41-23 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 61-03 | TANIDA Keiko |
| KOZUKA Katsuhiko | 43-21 | ISHIKAWA Akira |
| KOZUKA Katsuhiko | 33-31 | IWATA Hiroyuki |
| KOZUKA Katsuhiko | 33-31 | WATAHIKI Kenta |
| KOZUKA Katsuhiko | 44-20 | TSUCHIDA Daisuke |
| KOZUKA Katsuhiko | 38-26 | IWATA Hiroyuki |
| TAKANASHI Yusuke | 42-22 | KOZUKA Katsuhiko |
| NAKAJIMA Tetsuya | 36-28 | KOZUKA Katsuhiko |
| WATAHIKI Kenta | 40-24 | KOZUKA Katsuhiko |
| OZAWA Kou | 38-26 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 37-27 | TATSUMI-IIJIMA Yukiko |
2008-12-28: 27_King_State(Japan)
2008-12-20: 29_King_State_A(Japan)
2008-09-20: 26_King_State_special_A(Japan)
2008-08-24: 3_Ouza_sen(Japan)
2008-08-10: 2_Shinagawa(Japan)
2008-07-19: 2008 Japanese Championship(Japan)
2008-07-05: 47th Kanagawa seaside Open(Japan)
2008-07-05: 47_Shinagawa_open(Japan)
2008-06-08: 2008 Tokyo preliminary(Japan)
2008-05-25: 2nd Nishinomiya Open(Japan)
2008-05-24: 1st Shinagawa super league(Japan)
2008-04-29: 21st Kanto Open (Japan)
2008-03-23: 29_Meijin(Japan)
2008-02-17: 2008 Tokyo expert game(Japan)
2008-01-03: Shinagawa Open 2008(Japan)
| KOZUKA Katsuhiko | 43-21 | SUZUKI Yuta |
| YAMAKAWA Takashi | 41-23 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 55-09 | WATANABE Keiichi |
| KOZUKA Katsuhiko | 64-00 | SATO Tetsuya |
| KOZUKA Katsuhiko | 42-22 | MIYAZAKI Yuji |
| KOZUKA Katsuhiko | 40-24 | TATSUMI-IIJIMA Yukiko |
| KOZUKA Katsuhiko | 43-21 | SATO Koichiro |
| KOZUKA Katsuhiko | 45-19 | WATANABE Hideaki |
| MIYAZAKI Yuji | 43-21 | KOZUKA Katsuhiko |
| ISHIHARA Makoto | 34-30 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 42-22 | TSUKAMOTO Kazuma |
| NAKAMURA Yuya | 42-22 | KOZUKA Katsuhiko |
| ENOMOTO Yasuhiro | 46-18 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 54-10 | ISHIKAWA Akira |
| KOZUKA Katsuhiko | 34-30 | SATO Koichiro |
| NAKAMURA Yuya | 42-22 | KOZUKA Katsuhiko |
| NAGASHIMA Kazuhito | 40-24 | KOZUKA Katsuhiko |
| TANAKA Shuntaro | 44-20 | KOZUKA Katsuhiko |
| TAMENORI Hideshi | 45-19 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 45-19 | YASUJIMA Yuji |
| GOTO Hiroshi | 32-32 | KOZUKA Katsuhiko |
| NAGASHIMA Kazuhito | 32-32 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 33-31 | TSUCHIDA Eiji |
| KOZUKA Katsuhiko | 35-29 | SAKAGUCHI Kazuhiro |
| NAKAJIMA Tetsuya | 38-26 | KOZUKA Katsuhiko |
| ARAKI Kentaro | 34-30 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 37-27 | OHMORI Keita |
| YAMAKAWA Takashi | 41-23 | KOZUKA Katsuhiko |
| SATO Yuri | 33-31 | KOZUKA Katsuhiko |
| TATSUMI-IIJIMA Yukiko | 35-29 | KOZUKA Katsuhiko |
| MIYAOKA Tamaki | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | won against | KANOU Yuki |
| KOZUKA Katsuhiko | won against | OKAMOTO Kazuki |
| KOZUKA Katsuhiko | won against | WATANABE Hideki |
| NAGASAKI Hidekazu | won against | KOZUKA Katsuhiko |
| SAWAKI Yusuke | won against | KOZUKA Katsuhiko |
| TANIDA Kunihiko | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | won against | MORI Takahiro |
| KOZUKA Katsuhiko | won against | TATSUMI-IIJIMA Yukiko |
| KOBAYASHI Syunjiro | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | won against | NOBUKAWA Hiroki |
| KOZUKA Katsuhiko | won against | TAKEISHI Takuya |
| TANIDA Kunihiko | 38-26 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 36-28 | MORI Takahiro |
| KOZUKA Katsuhiko | 34-30 | TATSUMI-IIJIMA Yukiko |
| KOBAYASHI Syunjiro | 47-17 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 45-19 | NOBUKAWA Hiroki |
| KOZUKA Katsuhiko | 40-24 | TAKEISHI Takuya |
| KOZUKA Katsuhiko | won against | KAWAGUCHI Yuuki |
| KOZUKA Katsuhiko | won against | KAMIO Mamoru |
| KOZUKA Katsuhiko | won against | ISHIKAWA Akira |
| IWATA Hiroyuki | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | won against | SAWADA Tomohiro |
| KOZUKA Katsuhiko | won against | TSUCHIDA Daisuke |
| KOZUKA Katsuhiko | won against | MORIKAWA Masayoshi |
| NAKAMORI Hiroki | won against | KOZUKA Katsuhiko |
| NAKANISHI Toshiaki | lost to | KOZUKA Katsuhiko |
| SUZUKI Kenta | lost to | KOZUKA Katsuhiko |
| SUGASE Takahiro | won against | KOZUKA Katsuhiko |
| TERADA Shiyouzi | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | won against | IIJIMA Takamune |
| IWATA Hiroyuki | won against | KOZUKA Katsuhiko |
| MURAKAMI Takeshi | won against | KOZUKA Katsuhiko |
| NAKAJIMA Tetsuya | won against | KOZUKA Katsuhiko |
| ITO Junya | lost to | KOZUKA Katsuhiko |
| NAKAMURA Yuya | won against | KOZUKA Katsuhiko |
| ITO Junya | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | lost to | KOIDE Satoshi |
| AZUMA Hideki | lost to | KOZUKA Katsuhiko |
| WATANABE Keiichi | lost to | KOZUKA Katsuhiko |
| OKUDA Tsuyoshi | lost to | KOZUKA Katsuhiko |
| NAGASAKI Hidekazu | won against | KOZUKA Katsuhiko |
| WATANABE Hideaki | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 33-31 | IKEDA Atsuhiko |
| KOZUKA Katsuhiko | 33-31 | KAWAGUCHI Yuuki |
| GOTO Hiroshi | 33-31 | KOZUKA Katsuhiko |
| NAGASAKI Hidekazu | 33-31 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 33-31 | KANDA Yoshihiro |
| KOZUKA Katsuhiko | won against | KURIYAMA Yuriko |
| KOZUKA Katsuhiko | 32-32 | SUKO Masayuki |
| KURAMOCHI Yuta | 32-32 | KOZUKA Katsuhiko |
| TANAKA Shuntaro | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | lost to | TAKEISHI Takuya |
| KOZUKA Katsuhiko | won against | KOSHINO Kazuhiko |
| KURAMOCHI Yuta | lost to | KOZUKA Katsuhiko |
| OHHASHI Tomoshige | lost to | KOZUKA Katsuhiko |
| MURAKAMI Takeshi | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | won against | IIJIMA Takamune |
| NAGAO Hiroto | lost to | KOZUKA Katsuhiko |
| NAKAJIMA Tetsuya | won against | KOZUKA Katsuhiko |
| ITO Junya | won against | KOZUKA Katsuhiko |
2007-11-03: 41_Shinagawa_open(Japan)
2007-09-16: 2_Ouza_sen(Japan)
2007-09-02: 39th Shinagawa seaside tournament(Japan)
2007-09-01: 39_Shinagawa_open(Japan)
2007-07-15: Japanese Othello Championship(Japan)
2007-07-07: 37_Shinagawa_open(Japan)
2007-06-03: 9_Kawasaki_open(Japan)
2007-03-25: 28_Meijin_finals(Japan)
2007-02-03: 32_Shinagawa_open(Japan)
| KOZUKA Katsuhiko | 42-22 | SHIMONOSONO Kozo |
| KOZUKA Katsuhiko | 53-11 | MASUDA Letaka |
| KOZUKA Katsuhiko | 37-27 | SEKIGUCHI Shinya |
| KOZUKA Katsuhiko | 37-27 | SUKO Masayuki |
| TOMINAGA Kenta | 34-30 | KOZUKA Katsuhiko |
| NAKAJIMA Tetsuya | 54-10 | KOZUKA Katsuhiko |
| TAMAKI Suguru | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | won against | OHNO Atsuko |
| NAGASHIMA Kazuhito | won against | KOZUKA Katsuhiko |
| YAMAKAWA Takashi | won against | KOZUKA Katsuhiko |
| HATA Hayato | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | won against | KOBAYASHI Ritsuko |
| URASHIMA Mei | won against | KOZUKA Katsuhiko |
| TAKANASHI Yusuke | lost to | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | won against | OKUDA Tsuyoshi |
| KOZUKA Katsuhiko | won against | SUGISAKI Harumi |
| NAKAJIMA Tetsuya | won against | KOZUKA Katsuhiko |
| TOMINAGA Kenta | won against | KOZUKA Katsuhiko |
| SATO Koichiro | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 38-26 | TAKANASHI Yusuke |
| KOZUKA Katsuhiko | 47-17 | OKUDA Tsuyoshi |
| KOZUKA Katsuhiko | 50-14 | SUGISAKI Harumi |
| NAKAJIMA Tetsuya | 44-20 | KOZUKA Katsuhiko |
| TOMINAGA Kenta | 38-26 | KOZUKA Katsuhiko |
| SATO Koichiro | 41-23 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | won against | OGURI Kenji |
| KOZUKA Katsuhiko | won against | TAKASHIMA Ryoji |
| KOZUKA Katsuhiko | won against | MIYAOKA Tamaki |
| KOZUKA Katsuhiko | won against | TSUCHIDA Eiji |
| HOSHINO Yoshihiro | won against | KOZUKA Katsuhiko |
| SAKAGUCHI Kazuhiro | won against | KOZUKA Katsuhiko |
| TATSUMI-IIJIMA Yukiko | 33-31 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 34-30 | KOMAGATA Masayuki |
| ITO Junya | 38-26 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 39-25 | AKIYAMA Tatsumi |
| SANO Yoko | 33-31 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 43-21 | NAKAMORI Hiroki |
| NAGAO Hiroto | won against | KOZUKA Katsuhiko |
| ITAGAKI Kenichi | won against | KOZUKA Katsuhiko |
| SAWAKI Yusuke | won against | KOZUKA Katsuhiko |
| YAMAMURA Yuuki | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | won against | INOUE Masaru |
| KOZUKA Katsuhiko | 45-19 | KATO Taiji |
| TOMINAGA Kenta | 35-29 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 38-26 | TOKUDA Naoya |
| KOZUKA Katsuhiko | 47-17 | URA Satoru |
| MURAKAMI Takeshi | 36-28 | KOZUKA Katsuhiko |
| TSUJI Shinji | 33-31 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 34-30 | NAKANO Maseru |
| KOZUKA Katsuhiko | 37-27 | TATSUMI-IIJIMA Yukiko |
| ENOMOTO Yasuhiro | 35-29 | KOZUKA Katsuhiko |
| MITSUYA Nobuaki | 49-15 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 42-22 | OMODERA Osamu |
| KOZUKA Katsuhiko | 47-17 | ITO Aya |
2006-11-04: 30_Shinagawa_open(Japan)
2006-06-03: 25_Shinagawa_open(Japan)
2006-03-11: 22_Shinagawa_open(Japan)
| KOZUKA Katsuhiko | 34-30 | KIKUKAWA Takamichi |
| KOZUKA Katsuhiko | 41-23 | NOGAMI Yoshiyuki |
| NAKAJIMA Tetsuya | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 45-19 | OHUCHI Yasuhiro |
| NODA Bintatsu | 37-27 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 33-31 | YAMAGUCHI Yoshiaki |
| KOZUKA Katsuhiko | 44-20 | WATANABE Keiichi |
| MITSUYA Nobuaki | 35-29 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 40-24 | SAWAKI Yusuke |
| KOZUKA Katsuhiko | 38-26 | NAGAO Hiroto |
| KOZUKA Katsuhiko | 41-23 | MIGAMO Shinya |
| NAKAJIMA Tetsuya | 35-29 | KOZUKA Katsuhiko |
| NAGASAKI Hidekazu | 47-17 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 55-09 | KUSUMOTO Nobushige |
| TATSUMI-IIJIMA Yukiko | 39-25 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 49-15 | SHIMONOSONO Kozo |
| KOZUKA Katsuhiko | 47-17 | SATAKE Yosuke |
| ENOMOTO Yasuhiro | 39-25 | KOZUKA Katsuhiko |
2005-09-17: 17_Shinagawa_open(Japan)
2005-07-17: 33rd all Japan(Japan)
2005-06-04: 14_Shinagawa_open(Japan)
| KOZUKA Katsuhiko | 41-23 | NAKAJIMA Yukari |
| KOZUKA Katsuhiko | 40-24 | SATAKE Yosuke |
| NODA Bintatsu | 39-25 | KOZUKA Katsuhiko |
| KASHIWAGI Mitsuyoshi | 34-30 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 44-20 | TATSUMI-IIJIMA Yukiko |
| KOIKE Hiroto | 48-16 | KOZUKA Katsuhiko |
| NAGASHIMA Kazuhito | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | won against | OKAMOTO Junya |
| SUGASE Takahiro | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | won against | YAMAGUCHI Keita |
| IMAI Takatoshi | won against | KOZUKA Katsuhiko |
| NODA Bintatsu | won against | KOZUKA Katsuhiko |
| YAMAKAWA Takashi | 39-25 | KOZUKA Katsuhiko |
| SUZUKI Yoshimasa | 35-29 | KOZUKA Katsuhiko |
| TANIDA Kunihiko | 34-30 | KOZUKA Katsuhiko |
| YAMADA Daisuke | 35-29 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 51-13 | FUJII Keisuke |
| KOZUKA Katsuhiko | 54-10 | OGAWA Daisuke |
2004-12-11: 8_Shinagawa_open(Japan)
2004-08-07: 4_Shinagawa_open(Japan)
| HOSHI Ryuichi | 49-15 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | 47-17 | ISHIZAKI Masatoshi |
| KOZUKA Katsuhiko | 37-27 | NODA Bintatsu |
| KOZUKA Katsuhiko | 35-29 | KURACHI Takayuki |
| KOZUKA Katsuhiko | 40-24 | SHUICHI Tsuda |
| KOZUKA Katsuhiko | 34-30 | SATAKE Yosuke |
| KOZUKA Katsuhiko | 38-26 | HAYASHI Yusuke |
| ITO Yuji | 36-28 | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | won against | KASHIWAGI Mitsuyoshi |
| KOZUKA Katsuhiko | 50-14 | OHUCHI Yasuhiro |
| KOZUKA Katsuhiko | 39-25 | TACHIKI Akira |
| ISHIZAKI Hikaru | 36-28 | KOZUKA Katsuhiko |
1994-07-31: 22nd All Japan(Japan)
| KOZUKA Katsuhiko | won against | FUKAMI Tomohiro |
| KOZUKA Katsuhiko | won against | MURAKAMI Takeshi |
| KOZUKA Katsuhiko | won against | HAKASE Ron |
| KOZUKA Katsuhiko | won against | GOTO Hiroshi |
| KOZUKA Katsuhiko | won against | KOMAGATA Masayuki |
| KITAJIMA Hideki | won against | KOZUKA Katsuhiko |
| TAKIZAWA Nobuyuki | won against | KOZUKA Katsuhiko |
1993-08-23: 21st All Japan(Japan)
| KOZUKA Katsuhiko | won against | NAKAJIMA Tetsuya |
| KOZUKA Katsuhiko | won against | TOJO Atsushi |
| NOMURA Hisaichi | won against | KOZUKA Katsuhiko |
1992-08-08: 20th All Japan(Japan)
| SAKAGUCHI Kazuhiro | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | won against | FUNASAKI Hiro |
| KOZUKA Katsuhiko | won against | URA Satoru |
| KOZUKA Katsuhiko | won against | KOBAYASHI Atsushi |
1991-08-04: 19th All Japan(Japan)
| TAKIZAWA Nobuyuki | won against | KOZUKA Katsuhiko |
| KOZUKA Katsuhiko | won against | KOBAYASHI Atsushi |
| KOZUKA Katsuhiko | won against | HASEGAWA Takeshi |