Ratings
IWASAKA Ryuji (Japan)
Japanese name(s): 岩坂龍次98 tournaments
520 results
Player ID: 10381
Rated 720 in Japan and 886 in Asia&Oceania&Africa and T1204 in the World
Latest rating: 1253
520 results
Player ID: 10381
Rated 720 in Japan and 886 in Asia&Oceania&Africa and T1204 in the World
Latest rating: 1253
- 2025
- 2024
- 2023
- 2022
- 2021
- 2020
- 2019
- 2018
- 2017
- 2016
- 2015
- 2014
- 2013
- 2012
- 2011
- 2010
- 2009
- 2008
- 2002
- 2001
- 2000
- 1999
2025-07-27: 58_Niigata_challenge_cup(Japan)
2025-05-11: 57_Niigata_challenge_cup(Japan)
| IWASAKA Ryuji | 54-10 | OHHASHI Fuka |
| IWASAKA Ryuji | 40-24 | NAKAGAWA Haruka |
| TANAKA Yuki | 42-22 | IWASAKA Ryuji |
| OYAMA Ryuhei | 40-24 | IWASAKA Ryuji |
| UCHIYAMA Go | 42-22 | IWASAKA Ryuji |
| IWASAKA Ryuji | 33-31 | TSUCHIDA Aozora |
| DESAKI Kenichi | 57-07 | IWASAKA Ryuji |
| ISHII Tatsuhiro | 36-28 | IWASAKA Ryuji |
| IWASAKA Ryuji | 64-00 | NAKAJIMA Kaede |
| MAHO Makoto | 59-05 | IWASAKA Ryuji |
2024-11-17: 56_Niigata_challenge_cup(Japan)
2024-07-07: 55_Niigata_challenge_cup(Japan)
2024-05-12: 54_Niigata_challenge_cup(Japan)
2024-04-07: 85_Niigata_conf(Japan)
| IWASAKA Ryuji | 53-11 | OKADA Ren |
| UMEDA Yuu | 33-31 | IWASAKA Ryuji |
| IWASAKA Ryuji | 57-07 | SAKURAGAWA Yuka |
| IWASAKA Ryuji | 57-07 | OKADA Ryo |
| NAGATA Yuuya | 51-13 | IWASAKA Ryuji |
| IWASAKA Ryuji | 48-16 | KUZUHARA Shigeki |
| IWASAKA Ryuji | 53-11 | SUZUKI Keisho |
| IWASAKA Ryuji | 40-24 | TSUCHIDA Hana |
| IWASAKA Ryuji | 52-12 | TSUCHIDA Aozora |
| KUZUHARA Makoto | 40-24 | IWASAKA Ryuji |
| UCHIYAMA Go | 39-25 | IWASAKA Ryuji |
| DESAKI Kenichi | 43-21 | IWASAKA Ryuji |
| TSUCHIDA Aozora | 40-24 | IWASAKA Ryuji |
| IWASAKA Ryuji | 56-08 | SUZUKI Asami |
| IWASAKA Ryuji | 49-15 | TSUCHIDA Hana |
| IWASAKA Ryuji | 42-22 | TUSCHIDA Manabu |
| TAKIZAWA Masaki | 64-00 | IWASAKA Ryuji |
| IWASAKA Ryuji | 56-08 | TSUCHIDA Hana |
| NAGAO Hiroto | 62-02 | IWASAKA Ryuji |
| NAGATA Yuuya | 64-00 | IWASAKA Ryuji |
2023-11-12: 53_Niigata_challenge_cup(Japan)
2023-10-08: 49_All_Japan_Niigata_prelim(Japan)
2023-08-27: 41_Sea_of_Japan_open(Japan)
2023-07-23: 52_Niigata_challenge_cup(Japan)
2023-06-24: Niigata_open_2023(Japan)
2023-05-21: 51_Niigata_challenge_cup(Japan)
2023-04-02: 83_Niigata_conf(Japan)
2023-02-26: 40_Sea_of_Japan_open(Japan)
| NAKAOKA Hitoshi | 39-25 | IWASAKA Ryuji |
| IWASAKA Ryuji | 43-21 | NAKAOKA Mizue |
| NAKAGAWA Azune | 49-15 | IWASAKA Ryuji |
| IWASAKA Ryuji | 44-20 | NAKAOKA Itsuki |
| IWASAKA Ryuji | 49-15 | TSUBOYA Saki |
| MIYAKE Raku | 51-13 | IWASAKA Ryuji |
| AIHARA Shigeaki | 53-11 | IWASAKA Ryuji |
| NAGAO Hiroto | 55-09 | IWASAKA Ryuji |
| NAKAGAWA Azune | 33-31 | IWASAKA Ryuji |
| UMEZAWA Yoshinori | 61-03 | IWASAKA Ryuji |
| TAKIZAWA Masaki | 58-06 | IWASAKA Ryuji |
| NAGAO Hiroto | 52-12 | IWASAKA Ryuji |
| MIYAKE Raku | 51-13 | IWASAKA Ryuji |
| IWASAKA Ryuji | 40-24 | SUZUKI Keisho |
| KOBAYASHI Syunjiro | 56-08 | IWASAKA Ryuji |
| IWASAKA Ryuji | 49-15 | TSUBOYA Saki |
| SUWABE Yuki | 48-16 | IWASAKA Ryuji |
| MIYAKE Raku | 33-31 | IWASAKA Ryuji |
| IWASAKA Ryuji | 51-13 | SUGUWARA Fumiko |
| IWASAKA Ryuji | 44-20 | MIYAKE Yasutaka |
| NAKAGAWA Yuusa | 39-25 | IWASAKA Ryuji |
| IWASAKA Ryuji | 35-29 | SUGUWARA Mochi |
| AIHARA Shigeaki | 53-11 | IWASAKA Ryuji |
| KOBAYASHI Kano | 48-16 | IWASAKA Ryuji |
| MIYAKE Raku | 42-22 | IWASAKA Ryuji |
| TAYAMA Tsubasa | 38-26 | IWASAKA Ryuji |
| UMEZAWA Yoshinori | 57-07 | IWASAKA Ryuji |
| IWASAKA Ryuji | 44-20 | SHINOHARA Ryo |
| KOBAYASHI Kano | 52-12 | IWASAKA Ryuji |
| IWASAKA Ryuji | 33-31 | KATO Yuuki |
| NAKAGAWA Yuusa | 55-09 | IWASAKA Ryuji |
| MIYAKE Raku | 51-13 | IWASAKA Ryuji |
| IWASAKA Ryuji | 44-20 | NAKAGAWA Haruka |
| IWASAKA Ryuji | 43-21 | MIYAKE Yasutaka |
| HASEGAWA Takeshi | 58-06 | IWASAKA Ryuji |
| NAGATA Subaru | 53-11 | IWASAKA Ryuji |
| KOBAYASHI Manabu | 43-21 | IWASAKA Ryuji |
| MIYAKE Raku | 56-08 | IWASAKA Ryuji |
| NAGATA Yuuya | 48-16 | IWASAKA Ryuji |
| IWASAKA Ryuji | 58-06 | OTAIRA Kousuke |
| KANO Chihiro | 48-16 | IWASAKA Ryuji |
| KOBAYASHI Manabu | 43-21 | IWASAKA Ryuji |
| AIHARA Shigeaki | 34-30 | IWASAKA Ryuji |
| IWASAKA Ryuji | 36-28 | KANO Yusuke |
| IWASAKA Ryuji | 33-31 | MIYAKE Raku |
2022-12-04: 82_Niigata_conf(Japan)
2022-10-30: 50_Niigata_challenge_cup(Japan)
2022-08-21: 39_sea_of_Japan_open(Japan)
2022-07-24: 49_Niigata_challenge_cup(Japan)
2022-05-22: 48_Niigata_challenge_cup(Japan)
2022-04-03: 81_Niigata_conf(Japan)
| HASEGAWA Takeshi | 59-05 | IWASAKA Ryuji |
| UMEZAWA Shiho | 37-27 | IWASAKA Ryuji |
| KOBAYASHI Manabu | won against | IWASAKA Ryuji |
| MIYAKE Raku | 42-22 | IWASAKA Ryuji |
| KANDA Yoshihiro | 41-23 | IWASAKA Ryuji |
| ONO Taiga | 51-13 | IWASAKA Ryuji |
| IWASAKA Ryuji | 33-31 | OHGA Nao |
| NAGATA Yuuya | 48-16 | IWASAKA Ryuji |
| IWASAKA Ryuji | 39-25 | NAKAGAWA Yuusa |
| MAHO Makoto | 40-24 | IWASAKA Ryuji |
| HASEGAWA Takeshi | 50-14 | IWASAKA Ryuji |
| KITAJIMA Hideki | 64-00 | IWASAKA Ryuji |
| MIYAKE Raku | 47-17 | IWASAKA Ryuji |
| MAHO Makoto | 45-19 | IWASAKA Ryuji |
| IWASAKA Ryuji | 47-17 | KANO Yusuke |
| OHGA Nao | 37-27 | IWASAKA Ryuji |
| IWASAKA Ryuji | 37-27 | NAKAGAWA Azune |
| SAWADA Aomi | 53-11 | IWASAKA Ryuji |
| IWASAKA Ryuji | 38-26 | MORIWAKI Mizuki |
| IWASAKA Ryuji | 35-29 | NAKAGAWA Yuusa |
| CHIBA Seima | 33-31 | IWASAKA Ryuji |
| IWASAKA Ryuji | 40-24 | OHNO Aori |
| UMEZAWA Riho | 36-28 | IWASAKA Ryuji |
| TANAKA Koto | 53-11 | IWASAKA Ryuji |
| IWASAKA Ryuji | 54-10 | IGARASHI Kanta |
| IWASAKA Ryuji | 36-28 | MINAMI Yusuke |
| TAKIZAWA Masaki | 59-05 | IWASAKA Ryuji |
| KANEKO Hikaru | 50-14 | IWASAKA Ryuji |
| IWASAKA Ryuji | 47-17 | KOSUGI Kimio |
| UMEZAWA Yoshinori | 61-03 | IWASAKA Ryuji |
2021-12-05: 80_Niigata_conf(Japan)
2021-10-24: 47_Niigata_challenge_cup(Japan)
2021-04-04: 79_Niigata_conf(Japan)
2021-01-31: Niigata_expert_games(Japan)
| HASEGAWA Takeshi | 53-11 | IWASAKA Ryuji |
| IWASAKA Ryuji | 46-18 | NAKAGAWA Yoshitaka |
| KAWAI Shinobu | 52-12 | IWASAKA Ryuji |
| KANDA Yoshihiro | 50-14 | IWASAKA Ryuji |
| HASHIMOTO Yuuta | 41-23 | IWASAKA Ryuji |
| IWASAKA Ryuji | 37-27 | MAEHARA Tsuki |
| OHIRA Masatake | 41-23 | IWASAKA Ryuji |
| NAGATA Subaru | 49-15 | IWASAKA Ryuji |
| IWASAKA Ryuji | 43-21 | UMEDA Teruki |
| UMEZAWA Yoshinori | 59-05 | IWASAKA Ryuji |
| IWASAKA Ryuji | 34-30 | NAKAGAWA Yuusa |
| KOBAYASHI Syunjiro | 52-12 | IWASAKA Ryuji |
| NAGAO Hiroto | 53-11 | IWASAKA Ryuji |
| UMEZAWA Yoshinori | 53-11 | IWASAKA Ryuji |
| IWASAKA Ryuji | 34-30 | SAWADA Aomi |
| IWASAKA Ryuji | 38-26 | HONMA Tsugumi |
| KANDA Yoshihiro | 56-08 | IWASAKA Ryuji |
| OBARA Hiroto | 38-26 | IWASAKA Ryuji |
2020-12-06: 78_Niigata_conf(Japan)
| DOBASHI Yusuke | 46-18 | IWASAKA Ryuji |
| KANDA Yoshihiro | 40-24 | IWASAKA Ryuji |
| YOSHIDA Taisaku | 48-16 | IWASAKA Ryuji |
| KOBAYASHI Manabu | 35-29 | IWASAKA Ryuji |
| KANEKO Hikaru | 34-30 | IWASAKA Ryuji |
2019-12-08: 77_Niigata_conf(Japan)
2019-10-20: 48_All_Japan_Niigata_prelim(Japan)
2019-10-06: 44_Niigata_challenge_cup(Japan)
2019-09-15: Star_camp_2019(Japan)
2019-08-25: 36_Sea_of_Japan_open(Japan)
2019-07-21: 43_Niigata_challenge_cup(Japan)
2019-05-19: 42_Niigata_challenge_cup(Japan)
2019-04-07: 76_Niigata_conf(Japan)
2019-04-07: 76_Niigata_conference(Japan)
2019-02-17: 35_Sea_of_Japan_open(Japan)
2019-01-27: 2019_Niigata_expert_games(Japan)
| IWASAKA Ryuji | 35-29 | HONMA Tsugumi |
| SATO Hisakazu | 53-11 | IWASAKA Ryuji |
| NAKAGAWA Azune | 44-20 | IWASAKA Ryuji |
| IWASAKA Ryuji | 48-16 | HONMA Junko |
| KOBAYASHI Kano | 40-24 | IWASAKA Ryuji |
| TAKIZAWA Masaki | 47-17 | IWASAKA Ryuji |
| YOSHIDA Taisaku | 53-11 | IWASAKA Ryuji |
| IWASAKA Ryuji | 40-24 | NAKAGAWA Yoshitaka |
| NAKAGAWA Azune | 43-21 | IWASAKA Ryuji |
| UMEZAWA Yoshinori | 46-18 | IWASAKA Ryuji |
| KOBAYASHI Kano | 49-15 | IWASAKA Ryuji |
| IWASAKA Ryuji | 51-13 | KODAMA Kaori |
| IWASAKA Ryuji | 39-25 | NAKANO Akane |
| KOBAYASHI Syunjiro | 41-23 | IWASAKA Ryuji |
| IWASAKA Ryuji | 52-12 | HONMA Tsugumi |
| NAKAGAWA Azune | 35-29 | IWASAKA Ryuji |
| WADA Chiaki | 42-22 | IWASAKA Ryuji |
| YOKOSAWA Haruko | 52-12 | IWASAKA Ryuji |
| MIURA Toshie | 39-25 | IWASAKA Ryuji |
| IZUMI Shinya | 51-13 | IWASAKA Ryuji |
| SATO Hisakazu | 58-06 | IWASAKA Ryuji |
| KANO Chihiro | 46-18 | IWASAKA Ryuji |
| OSHIMIZU Takanori | 63-01 | IWASAKA Ryuji |
| IWASAKA Ryuji | 48-16 | NAKAGAWA Azune |
| NAGASAKI Hidekazu | 53-11 | IWASAKA Ryuji |
| TAKIZAWA Masaki | 54-10 | IWASAKA Ryuji |
| KOBAYASHI Kano | 40-24 | IWASAKA Ryuji |
| OHTAKE Kosuke | 42-22 | IWASAKA Ryuji |
| IWASAKA Ryuji | 37-27 | WATANABE Yasuo |
| IWASAKA Ryuji | 48-16 | OHNO Aori |
| KOBAYASHI Syunjiro | 56-08 | IWASAKA Ryuji |
| SAWADA Atsushi | 40-24 | IWASAKA Ryuji |
| IWASAKA Ryuji | 61-03 | NAKAGAWA Yuusa |
| IWASAKA Ryuji | 38-26 | KOBAYASHI Kano |
| OKUNO Masakazu | 49-15 | IWASAKA Ryuji |
| NAKAYAMA Souki | 36-28 | IWASAKA Ryuji |
| IWASAKA Ryuji | 45-19 | NAKAGAWA Yuusa |
| IWASAKA Ryuji | 52-12 | YAMAGUCHI Uru |
| KUSU Daiki | 33-31 | IWASAKA Ryuji |
| KANO Chihiro | 35-29 | IWASAKA Ryuji |
| KOBAYASHI Syunjiro | 51-13 | IWASAKA Ryuji |
| IWASAKA Ryuji | 38-26 | ISHIZAWA Manaka |
| KANDA Yoshihiro | 46-18 | IWASAKA Ryuji |
| IWASAKA Ryuji | 35-29 | NAKAGAWA Azune |
| KANO Chihiro | 35-29 | IWASAKA Ryuji |
| KOBAYASHI Syunjiro | 51-13 | IWASAKA Ryuji |
| IWASAKA Ryuji | 38-26 | ISHIZAWA Manaka |
| KANDA Yoshihiro | 46-18 | IWASAKA Ryuji |
| IWASAKA Ryuji | 35-29 | NAKAGAWA Azune |
| KOBAYASHI Kano | 50-14 | IWASAKA Ryuji |
| SAWADA Atsushi | 48-16 | IWASAKA Ryuji |
| IWASAKA Ryuji | 42-22 | ISHIZAWA Manaka |
| KANO Chihiro | 50-14 | IWASAKA Ryuji |
| KOBAYASHI Manabu | 39-25 | IWASAKA Ryuji |
| IWASAKA Ryuji | 33-31 | KUSU Daiki |
| NAGAO Hiroto | 37-27 | IWASAKA Ryuji |
| KOBAYASHI Kano | 51-13 | IWASAKA Ryuji |
| UMEZAWA Yoshinori | 61-03 | IWASAKA Ryuji |
| IWASAKA Ryuji | 45-19 | OTA Hara |
2018-12-09: 75_Niigata_conference(Japan)
2018-11-11: 41_Niigata_challenge_cup(Japan)
2018-08-19: 34_Sea_of_Japan_open(Japan)
2018-06-17: 46_All_Japan_Niigata_prelim(Japan)
2018-05-20: 40_Niigata_challenge_cup(Japan)
2018-04-08: 74_Niigata_conference(Japan)
| OTA Hara | 45-19 | IWASAKA Ryuji |
| IWASAKA Ryuji | 42-22 | OHNO Aori |
| IWASAKA Ryuji | 46-18 | TOKUDA Mao |
| UMEZAWA Yoshinori | 51-13 | IWASAKA Ryuji |
| IWASAKA Ryuji | 35-29 | HORIUCHI Keiko |
| IWASAKA Ryuji | 37-27 | SAWADA Aomi |
| NAKAYAMA Souki | 32-32 | IWASAKA Ryuji |
| KOBAYASHI Kano | 50-14 | IWASAKA Ryuji |
| OKUNO Masakazu | 53-11 | IWASAKA Ryuji |
| IWASAKA Ryuji | 52-12 | NAKAGAWA Yoshitaka |
| KOBAYASHI Kano | 47-17 | IWASAKA Ryuji |
| KANO Chihiro | 54-10 | IWASAKA Ryuji |
| IWASAKA Ryuji | 55-09 | OSADA Michi |
| KUSHI Ryota | 48-16 | IWASAKA Ryuji |
| MATSUHASHI Satoi | 39-25 | IWASAKA Ryuji |
| OBARA Hiroto | 51-13 | IWASAKA Ryuji |
| AIHARA Shigeaki | 43-21 | IWASAKA Ryuji |
| IWASAKA Ryuji | 52-12 | WATANABE Tadayuki |
| IWASAKA Ryuji | 41-23 | WATANABE Hiromi |
| KOBAYASHI Kano | 54-10 | IWASAKA Ryuji |
| NAGAO Hiroto | 58-06 | IWASAKA Ryuji |
| IWASAKA Ryuji | 47-17 | ISHIZAWA Manaka |
| IWASAKA Ryuji | 38-26 | DOBASHI Yusuke |
| OBARA Hiroto | 40-24 | IWASAKA Ryuji |
| KOBAYASHI Kano | 42-22 | IWASAKA Ryuji |
| OKUNO Masakazu | 51-13 | IWASAKA Ryuji |
| OHTAKE Kosuke | 37-27 | IWASAKA Ryuji |
| IWASAKA Ryuji | 42-22 | OKAMOTO Sakutaro |
| KATAGIRI Tomotaka | 37-27 | IWASAKA Ryuji |
| SATO Kaishun | 34-30 | IWASAKA Ryuji |
2017-12-10: 73_Niigata_conference(Japan)
2017-11-19: 39_Niigata_challenge_cup(Japan)
2017-10-08: Star_camp_2017(Japan)
2017-08-20: 32_Sea_of_Japan_open(Japan)
2017-06-18: 45_All_Japan_Niigata_prelim(Japan)
2017-05-28: 38_Niigata_challenge_cup(Japan)
2017-04-09: 72_Niigata_conf(Japan)
| KOBAYASHI Manabu | 54-10 | IWASAKA Ryuji |
| IWASAKA Ryuji | 42-22 | ETO Eiko |
| KOYAMA Hitoshi | 37-27 | IWASAKA Ryuji |
| IWASAKA Ryuji | 43-21 | WATANABE Hiromi |
| IWASAKA Ryuji | 53-11 | OTA Hara |
| IWASAKA Ryuji | 53-11 | TAKAHASHI Kentaro |
| AOKI Ryousuke | 50-14 | IWASAKA Ryuji |
| IWASAKA Ryuji | 40-24 | IMADA Shin |
| KOBAYASHI Syunjiro | 50-14 | IWASAKA Ryuji |
| IWASAKA Ryuji | 39-25 | UMEZAWA Yoshinori |
| SATO Hisakazu | 55-09 | IWASAKA Ryuji |
| SUGAWARA Misa | 51-13 | IWASAKA Ryuji |
| ETO Riichi | 38-26 | IWASAKA Ryuji |
| TAKIZAWA Masaki | 54-10 | IWASAKA Ryuji |
| NAGAO Hiroto | 55-09 | IWASAKA Ryuji |
| IWASAKA Ryuji | 33-31 | KOBAYASHI Kano |
| IWASAKA Ryuji | 43-21 | MATSUHASHI Satoi |
| TAKIZAWA Masaki | 33-31 | IWASAKA Ryuji |
| NAGASAKI Hidekazu | 48-16 | IWASAKA Ryuji |
| UMEZAWA Yoshinori | 44-20 | IWASAKA Ryuji |
| OSHIMIZU Takanori | 54-10 | IWASAKA Ryuji |
| KANDA Yoshihiro | 47-17 | IWASAKA Ryuji |
| OBARA Hiroto | 60-04 | IWASAKA Ryuji |
| IWASAKA Ryuji | 49-15 | TAKIZAWA Takaryou |
| MATSUHASHI Satoi | 36-28 | IWASAKA Ryuji |
| ETO Riichi | 51-13 | IWASAKA Ryuji |
| IWASAKA Ryuji | 48-16 | KARASAWA Takahiro |
| IWASAKA Ryuji | 36-28 | SAWADA Atsushi |
| TAKANO Kunihiko | 44-20 | IWASAKA Ryuji |
| IWASAKA Ryuji | 44-20 | SAWADA Aomi |
| IWASAKA Ryuji | 49-15 | IMADA Shin |
| OBARA Hiroto | 33-31 | IWASAKA Ryuji |
| KANDA Yoshihiro | 52-12 | IWASAKA Ryuji |
| IWASAKA Ryuji | 40-24 | UDA Azusa |
| IWASAKA Ryuji | 50-14 | HASEGAWA Yuta |
| KOBAYASHI Manabu | 48-16 | IWASAKA Ryuji |
| IWASAKA Ryuji | 46-18 | OBARA Hiroaki |
2016-12-11: 71_Niigata_conference(Japan)
2016-11-20: 37_Niigata_challenge_cup(Japan)
2016-08-21: 30_Sea_of_Japan_open(Japan)
2016-06-19: 44_All_Japan_Niigata_prelim(Japan)
2016-05-22: 36_Niigata_challenge_cup(Japan)
2016-04-03: 70_Niigata_conference(Japan)
| SATO Hisakazu | 47-17 | IWASAKA Ryuji |
| TAKIZAWA Masaki | 56-08 | IWASAKA Ryuji |
| IWASAKA Ryuji | 64-00 | TEJIMA Kouyou |
| IWASAKA Ryuji | 53-11 | MISAKI Ayato |
| ETO Riichi | 39-25 | IWASAKA Ryuji |
| IWASAKA Ryuji | 47-17 | IMADA Kanako |
| IWASAKA Ryuji | 43-21 | UMEZAWA Riho |
| HANAZATO Michio | 53-11 | IWASAKA Ryuji |
| IWASAKA Ryuji | 50-14 | KOBAYASHI Kano |
| UMEZAWA Shiho | 47-17 | IWASAKA Ryuji |
| NAGASAKI Hidekazu | 42-22 | IWASAKA Ryuji |
| KOBAYASHI Syunjiro | 52-12 | IWASAKA Ryuji |
| UMEZAWA Yoshinori | 64-00 | IWASAKA Ryuji |
| IWASAKA Ryuji | 40-24 | ETO Riichi |
| UMEZAWA Shiho | 38-26 | IWASAKA Ryuji |
| KANDA Yoshihiro | 53-11 | IWASAKA Ryuji |
| KOBAYASHI Kano | 42-22 | IWASAKA Ryuji |
| IWASAKA Ryuji | 52-12 | TANABE Tatsuo |
| ETO Riichi | 40-24 | IWASAKA Ryuji |
| ISHIKAWA Hiroyuki | 52-12 | IWASAKA Ryuji |
| TANABE Tomoki | 35-29 | IWASAKA Ryuji |
| IWASAKA Ryuji | 50-14 | ETO Riichi |
| IWASAKA Ryuji | 45-19 | KOBAYASHI Kano |
| INUBUSHI Kouki | 49-15 | IWASAKA Ryuji |
| TANABE Tomoki | 42-22 | IWASAKA Ryuji |
| OBARA Hiroto | 46-18 | IWASAKA Ryuji |
| NAGASAKI Hidekazu | 53-11 | IWASAKA Ryuji |
| IWASAKA Ryuji | 38-26 | UMEZAWA Riho |
| IWASAKA Ryuji | 33-31 | UMEZAWA Shiho |
| INUBUSHI Kouki | 63-01 | IWASAKA Ryuji |
| KANDA Yoshihiro | 55-09 | IWASAKA Ryuji |
2015-12-13: 69_Niigata_conference(Japan)
2015-10-11: Star_camp_2015(Japan)
2015-08-23: 28_Sea_of_Japan_open(Japan)
2015-06-14: 43_All_Japan_Niigata_prelim(Japan)
2015-05-31: 34_Niigata_challenge_cup(Japan)
2015-04-05: 68_Niigata_conference(Japan)
| OBARA Hiroto | 48-16 | IWASAKA Ryuji |
| KANDA Yoshihiro | 38-26 | IWASAKA Ryuji |
| UMEZAWA Yoshinori | 56-08 | IWASAKA Ryuji |
| IWASAKA Ryuji | 50-14 | TAKAHASHI Masahiro |
| OSHIMIZU Takanori | 48-16 | IWASAKA Ryuji |
| WADA Masaki | 43-21 | IWASAKA Ryuji |
| YOSHIDA Taisaku | 45-19 | IWASAKA Ryuji |
| WADA Chiaki | 55-09 | IWASAKA Ryuji |
| YASUJIMA Yuji | 48-16 | IWASAKA Ryuji |
| SUGAWARA Misa | 55-09 | IWASAKA Ryuji |
| SATO Hisakazu | 52-12 | IWASAKA Ryuji |
| TAKANASHI Yusuke | 62-02 | IWASAKA Ryuji |
| IWASAKA Ryuji | 40-24 | ETO Riichi |
| KOBAYASHI Syunjiro | 51-13 | IWASAKA Ryuji |
| KANDA Yoshihiro | 58-06 | IWASAKA Ryuji |
| IWASAKA Ryuji | 44-20 | UMEZAWA Riho |
| IWASAKA Ryuji | 35-29 | KOBAYASHI Kano |
| OBARA Hiroto | 45-19 | IWASAKA Ryuji |
| KANDA Yoshihiro | 51-13 | IWASAKA Ryuji |
| IWASAKA Ryuji | 52-12 | OBARA Shinko |
| UMEZAWA Yoshinori | 40-24 | IWASAKA Ryuji |
| AIHARA Shigeaki | 54-10 | IWASAKA Ryuji |
| UMEZAWA Shiho | 49-15 | IWASAKA Ryuji |
| IWASAKA Ryuji | 40-24 | KOBAYASHI Kano |
| OBARA Hiroto | 48-16 | IWASAKA Ryuji |
| IWASAKA Ryuji | 45-19 | FUKUCHI Katsunori |
| IWASAKA Ryuji | 33-31 | INUBUSHI Kouki |
| IWASAKA Ryuji | 51-13 | WATANABE Yoshiko |
| IWASAKA Ryuji | 39-25 | TANABE Tomoki |
| NAGAO Hiroto | 44-20 | IWASAKA Ryuji |
| IWASAKA Ryuji | 54-10 | KOBAYASHI Kano |
| KOBAYASHI Manabu | 49-15 | IWASAKA Ryuji |
| IWASAKA Ryuji | 47-17 | UMEZAWA Riho |
2014-08-24: 26_Sea_of_Japan_open(Japan)
2014-06-15: 42_All_Japan_Niigata_prelim(Japan)
2014-04-06: 66_Niigata_conference(Japan)
2014-02-16: 25_Sea_of_Japan_open(Japan)
2014-01-26: 2014_Niigata_expert_games(Japan)
| SATO Hisakazu | 63-01 | IWASAKA Ryuji |
| SASAKI Sadayuki | 35-29 | IWASAKA Ryuji |
| IWASAKA Ryuji | 58-06 | MIZOGUCHI Hiranaga |
| KOBAYASHI Syunjiro | 50-14 | IWASAKA Ryuji |
| UMEZAWA Shiho | 47-17 | IWASAKA Ryuji |
| IWASAKA Ryuji | 43-21 | TANABE Tatsuo |
| OBARA Hiroto | 35-29 | IWASAKA Ryuji |
| UMEZAWA Yoshinori | 57-07 | IWASAKA Ryuji |
| UMEZAWA Shiho | 51-13 | IWASAKA Ryuji |
| IWASAKA Ryuji | 48-16 | HONMA Arisa |
| IWASAKA Ryuji | 57-07 | WADA Tokitaka |
| HANAZATO Michio | 54-10 | IWASAKA Ryuji |
| UMEZAWA Yoshinori | 49-15 | IWASAKA Ryuji |
| HANAZATO Michio | 52-12 | IWASAKA Ryuji |
| SATO Hisakazu | 47-17 | IWASAKA Ryuji |
| KOBAYASHI Manabu | 45-19 | IWASAKA Ryuji |
| KANDA Yoshihiro | 52-12 | IWASAKA Ryuji |
| AIHARA Shigeaki | 44-20 | IWASAKA Ryuji |
| IWASAKA Ryuji | 45-19 | HASEGAWA Hidetarou |
| SASAKI Sadayuki | 55-09 | IWASAKA Ryuji |
| IWASAKA Ryuji | 45-19 | UMEZAWA Shiho |
| KOBAYASHI Syunjiro | 56-08 | IWASAKA Ryuji |
| IWASAKA Ryuji | 51-13 | KOBAYASHI Kano |
| UMEZAWA Yoshinori | 61-03 | IWASAKA Ryuji |
| IWASAKA Ryuji | 48-16 | SUETSUNA Naoki |
| IWASAKA Ryuji | 37-27 | YOSHIZAWA Mitsuru |
| AIHARA Shigeaki | 52-12 | IWASAKA Ryuji |
| HANAZATO Michio | 40-24 | IWASAKA Ryuji |
2013-12-15: 65_Niigata_conference(Japan)
2013-08-18: 24_Sea_of_Japan_open(Japan)
2013-06-16: 41_All_Japan_Niigata_prelim(Japan)
| IWASAKA Ryuji | 34-30 | HORIUCHI Keiko |
| NAGASAKI Hidekazu | 54-10 | IWASAKA Ryuji |
| AIHARA Shigeaki | 49-15 | IWASAKA Ryuji |
| IWASAKA Ryuji | 45-19 | KOBAYASHI Kano |
| KOBAYASHI Syunjiro | 47-17 | IWASAKA Ryuji |
| HAMOTO Kazuhiro | 64-00 | IWASAKA Ryuji |
| SUEKUNI Makoto | 64-00 | IWASAKA Ryuji |
| IWASAKA Ryuji | 56-08 | UMEZAWA Shiho |
| AIHARA Shigeaki | 42-22 | IWASAKA Ryuji |
| OHTAKE Kosuke | 50-14 | IWASAKA Ryuji |
| KANDA Yoshihiro | 55-09 | IWASAKA Ryuji |
| TAKIZAWA Masaki | 57-07 | IWASAKA Ryuji |
| IWASAKA Ryuji | 56-08 | UMEZAWA Riho |
| AIHARA Shigeaki | 42-22 | IWASAKA Ryuji |
| IWASAKA Ryuji | 42-22 | UMEZAWA Shiho |
| KOBAYASHI Syunjiro | 46-18 | IWASAKA Ryuji |
| NAGAO Hiroto | 47-17 | IWASAKA Ryuji |
2012-08-19: 22_Sea_of_Japan_open(Japan)
2012-06-17: 40_All_Japan_Niigata_prelim(Japan)
2012-04-08: 62_Niigata_conf(Japan)
| SASAKI Sadayuki | 55-09 | IWASAKA Ryuji |
| NAGAO Hiroto | 42-22 | IWASAKA Ryuji |
| IWASAKA Ryuji | 42-22 | UMEZAWA Shiho |
| KOBAYASHI Manabu | 52-12 | IWASAKA Ryuji |
| KANDA Yoshihiro | 53-11 | IWASAKA Ryuji |
| HORIUCHI Keiko | 33-31 | IWASAKA Ryuji |
| UMEZAWA Yoshinori | 60-04 | IWASAKA Ryuji |
| IWASAKA Ryuji | 47-17 | UCHIYAMA Hirofumi |
| KANDA Yoshihiro | 62-02 | IWASAKA Ryuji |
| HAMADA Kengo | 46-18 | IWASAKA Ryuji |
| AIHARA Shigeaki | 53-11 | IWASAKA Ryuji |
| KOBAYASHI Syunjiro | 33-31 | IWASAKA Ryuji |
| KANDA Yoshihiro | 46-18 | IWASAKA Ryuji |
| HARII Mitsu | 48-16 | IWASAKA Ryuji |
| SHIBATA Kyo | 45-19 | IWASAKA Ryuji |
2011-08-21: 20_Sea_of_Japan_open(Japan)
2011-06-19: 39_Japan_champ_Niigata_prelim(Japan)
2011-04-10: 60_Niigata_conference(Japan)
| UMEZAWA Yoshinori | 58-06 | IWASAKA Ryuji |
| IGARASHI Toshiyuki | 46-18 | IWASAKA Ryuji |
| AIHARA Shigeaki | 57-07 | IWASAKA Ryuji |
| KOBAYASHI Syunjiro | 44-20 | IWASAKA Ryuji |
| IWASAKA Ryuji | 37-27 | KAWAKAMI Takahashi |
| SASAKI Sadayuki | 55-09 | IWASAKA Ryuji |
| UMEZAWA Yoshinori | 58-06 | IWASAKA Ryuji |
| YOSHIDA Taisaku | 34-30 | IWASAKA Ryuji |
| IWASAKA Ryuji | 46-18 | KERADA Miho |
| WATANABE Keiichi | 62-02 | IWASAKA Ryuji |
| OIKAWA Shinichi | 50-14 | IWASAKA Ryuji |
| AIHARA Shigeaki | 40-24 | IWASAKA Ryuji |
| KOBAYASHI Manabu | 53-11 | IWASAKA Ryuji |
| KANDA Yoshihiro | 55-09 | IWASAKA Ryuji |
| KAWAKAMI Takahashi | 43-21 | IWASAKA Ryuji |
2010-12-12: 59_Niigata_conference(Japan)
2010-08-22: 18_Sea_of_Japan_open(Japan)
2010-06-13: 38_Japan_Champ_Niigata_prelim(Japan)
2010-04-11: 58_Niigata_conf(Japan)
2010-02-14: 17_Sea_of_Japan_open(Japan)
| WATANABE Keiichi | 51-13 | IWASAKA Ryuji |
| KOBAYASHI Manabu | 44-20 | IWASAKA Ryuji |
| NOCHI Hinobota | 36-28 | IWASAKA Ryuji |
| IWASAKA Ryuji | 50-14 | KANDA Chohei |
| AIHARA Shigeaki | 50-14 | IWASAKA Ryuji |
| SATO Hisakazu | 57-07 | IWASAKA Ryuji |
| KOBAYASHI Syunjiro | 36-28 | IWASAKA Ryuji |
| IWASAKA Ryuji | 33-31 | TANI Takuto |
| KANDA Yoshihiro | 39-25 | IWASAKA Ryuji |
| KOBAYASHI Manabu | 40-24 | IWASAKA Ryuji |
| YOSHIDA Taisaku | 44-20 | IWASAKA Ryuji |
| AIHARA Shigeaki | 60-04 | IWASAKA Ryuji |
| IWASAKA Ryuji | 48-16 | KAWANOWA Syou |
| IWASAKA Ryuji | 39-25 | SATO Tsuyoshi |
| HARII Mitsu | 46-18 | IWASAKA Ryuji |
| HORIUCHI Keiko | 49-15 | IWASAKA Ryuji |
| IWASAKA Ryuji | 44-20 | TAKAI Akira |
| AIHARA Shigeaki | 39-25 | IWASAKA Ryuji |
| SASAKI Sadayuki | 38-26 | IWASAKA Ryuji |
| IWASAKA Ryuji | 35-29 | MIYAZAKI Takahiro |
| ASAHINA Satoshi | 42-22 | IWASAKA Ryuji |
| HARII Mitsu | 54-10 | IWASAKA Ryuji |
| SATO Hisakazu | 48-16 | IWASAKA Ryuji |
| SASAKI Sadayuki | 48-16 | IWASAKA Ryuji |
| IWASAKA Ryuji | 36-28 | YAMAZAKI Mitsuo |
| ORIYA Yasuto | 47-17 | IWASAKA Ryuji |
| IWAKURA Hiroaki | 53-11 | IWASAKA Ryuji |
| UMEZAWA Yoshinori | 37-27 | IWASAKA Ryuji |
2009-10-18: 2_RRGP(Japan)
2009-08-30: 16_Sea_of_Japan_open(Japan)
2009-06-14: 37_Japan_Champ_Niigata_prelim(Japan)
2009-04-12: 56_Niigata_Open(Japan)
2009-02-15: 15_Sea_of_Japan_open_A(Japan)
| ASAHINA Satoshi | 43-21 | IWASAKA Ryuji |
| SASAKI Sadayuki | 43-21 | IWASAKA Ryuji |
| OKAMOTO Shinya | 44-20 | IWASAKA Ryuji |
| HARII Mitsu | 40-24 | IWASAKA Ryuji |
| WAKAYAMA Yusuke | 41-23 | IWASAKA Ryuji |
| OHTAKE Kosuke | 44-20 | IWASAKA Ryuji |
| IWASAKA Ryuji | 36-28 | MIYAMOTO Iizuka |
| SATO Hisakazu | 43-21 | IWASAKA Ryuji |
| HARII Mitsu | 37-27 | IWASAKA Ryuji |
| SASAKI Sadayuki | 51-13 | IWASAKA Ryuji |
| HORIUCHI Keiko | 50-14 | IWASAKA Ryuji |
| IWASAKA Ryuji | 50-14 | WAKAYAMA Yusuke |
| KOBAYASHI Manabu | 41-23 | IWASAKA Ryuji |
| IWASAKA Ryuji | 33-31 | HORIUCHI Keiko |
| SASAKI Sadayuki | 38-26 | IWASAKA Ryuji |
| IWASAKA Ryuji | 51-13 | TAKAI Akira |
| MATSUZAWA Takashi | 54-10 | IWASAKA Ryuji |
| KOBAYASHI Syunjiro | 36-28 | IWASAKA Ryuji |
| IWASAKA Ryuji | 46-18 | SATO Tsuyoshi |
| KUDOU Keita | 49-15 | IWASAKA Ryuji |
| IWASAKA Ryuji | 60-04 | HIGUCHI Hiroomi |
| HARII Mitsu | 45-19 | IWASAKA Ryuji |
| UMEZAWA Yoshinori | 47-17 | IWASAKA Ryuji |
| KANDA Yoshihiro | 41-23 | IWASAKA Ryuji |
| SATO Hisakazu | 42-22 | IWASAKA Ryuji |
| SASAKI Sadayuki | 50-14 | IWASAKA Ryuji |
| TANAKA Atsushi | 45-19 | IWASAKA Ryuji |
| UMEZAWA Yoshinori | 64-00 | IWASAKA Ryuji |
| KANDA Yoshihiro | 62-02 | IWASAKA Ryuji |
2008-12-14: 55_Niigata_Open(Japan)
2008-10-12: StarCamp_2008(Japan)
2008-08-03: 14_Sea_of_Japan_open(Japan)
2008-06-15: 2008 Niigata conference(Japan)
| AIHARA Shigeaki | 36-28 | IWASAKA Ryuji |
| KANDA Yoshihiro | 41-23 | IWASAKA Ryuji |
| IWASAKA Ryuji | 39-25 | DATAU Soubi |
| HARII Mitsu | 42-22 | IWASAKA Ryuji |
| MATSUZAWA Takashi | 53-11 | IWASAKA Ryuji |
| NUNOME Naoya | 53-11 | IWASAKA Ryuji |
| SASAKI Sadayuki | 59-05 | IWASAKA Ryuji |
| KANDA Yoshihiro | 59-05 | IWASAKA Ryuji |
| IWASAKA Ryuji | 33-31 | SUZUKI Nobuyuki |
| KOSE Akira | 33-31 | IWASAKA Ryuji |
| IWASAKA Ryuji | 37-27 | YASUJIMA Yuji |
| ITO Satoshi | 47-17 | IWASAKA Ryuji |
| SHIROKI Hideyuki | 57-07 | IWASAKA Ryuji |
| GOTO Masahiro | 38-26 | IWASAKA Ryuji |
| KANDA Yoshihiro | 51-13 | IWASAKA Ryuji |
| ORIYA Yasuto | 47-17 | IWASAKA Ryuji |
| IWASAKA Ryuji | 42-22 | SASAKI Sadayuki |
| OHTAKE Kosuke | 40-24 | IWASAKA Ryuji |
| AIHARA Shigeaki | won against | IWASAKA Ryuji |
| NOCHI Hinobota | lost to | IWASAKA Ryuji |
| IWASAKA Ryuji | lost to | SATO Tsuyoshi |
| TAKAI Akira | lost to | IWASAKA Ryuji |
| HARII Mitsu | won against | IWASAKA Ryuji |
| KANDA Yoshihiro | won against | IWASAKA Ryuji |
2002-06-16: 30th All Japan Niigata Preliminaries(Japan)
2002-04-07: 42nd Niigata Othello Conference(Japan)
| UMEZAWA Yoshinori | won against | IWASAKA Ryuji |
| IWASAKA Ryuji | won against | WATANABE Aoyama |
| SASAKI Sadayuki | won against | IWASAKA Ryuji |
| IGARASHI Ai | won against | IWASAKA Ryuji |
| TAKAI Akira | won against | IWASAKA Ryuji |
| KANDA Yoshihiro | won against | IWASAKA Ryuji |
| IGARASHI Toshiyuki | won against | IWASAKA Ryuji |
| IWASAKA Ryuji | won against | MIYAMOTO Satoru |
| OKUNO Tomoji | won against | IWASAKA Ryuji |
| IWASAKA Ryuji | won against | WATANABE Teruko |
2001-12-23: 41st Niigata Othello Conference(Japan)
2001-06-24: 29th All Japan Niigata Preliminaries(Japan)
2001-03-11: 2001 Niigata Expert Game(Japan)
| YOSHIDA Taisaku | won against | IWASAKA Ryuji |
| OKUNO Tomoji | won against | IWASAKA Ryuji |
| KUME Tomofumi | won against | IWASAKA Ryuji |
| IWASAKA Ryuji | won against | NARUSE Yumiko |
| IWASAKA Ryuji | won against | WATANABE Teruko |
| IWASAKA Ryuji | won against | WATANABE Noboru |
| IWASAKA Ryuji | won against | TAKAI Akira |
| OKUNO Tomoji | won against | IWASAKA Ryuji |
| UMEZAWA Yoshinori | won against | IWASAKA Ryuji |
| SATO Tsuyoshi | won against | IWASAKA Ryuji |
| SASAKI Sadayuki | won against | IWASAKA Ryuji |
| OKUNO Tomoji | won against | IWASAKA Ryuji |
| WATANABE Teruko | won against | IWASAKA Ryuji |
| SUZUKI Nobuyuki | won against | IWASAKA Ryuji |
| KANDA Yoshihiro | won against | IWASAKA Ryuji |
2000-12-10: 39th Niigata Othello Conference(Japan)
2000-06-11: 28th All Japan Niigata Preliminaries(Japan)
2000-04-02: 38th Niigata Othello Conference(Japan)
| UMEZAWA Yoshinori | won against | IWASAKA Ryuji |
| OKUNO Tomoji | won against | IWASAKA Ryuji |
| KANDA Yoshihiro | won against | IWASAKA Ryuji |
| IWASAKA Ryuji | won against | WATANABE Teruko |
| SUZUKI Nobuyuki | won against | IWASAKA Ryuji |
| MATSUZAWA Takashi | won against | IWASAKA Ryuji |
| IWASAKA Ryuji | won against | NAKAMURA Akio |
| IGARASHI Nozomi | won against | IWASAKA Ryuji |
| AOYAGI Masaki | won against | IWASAKA Ryuji |
| IWASAKA Ryuji | won against | WATANABE Aoyama |
| MATSUZAWA Takashi | won against | IWASAKA Ryuji |
| IWASAKA Ryuji | won against | SATO Haruna |
| IWASAKA Ryuji | won against | SATO Kisan |
| MATSUZAWA Takashi | won against | IWASAKA Ryuji |
| YOKOI Taiki | won against | IWASAKA Ryuji |
1999-12-23: 37th Niigata Othello Conference(Japan)
| YOKOI Taiki | won against | IWASAKA Ryuji |
| KANDA Yoshihiro | won against | IWASAKA Ryuji |
| WATANABE Suigetsu | won against | IWASAKA Ryuji |
| IWASAKA Ryuji | won against | WATANABE Teruko |
| IWASAKA Ryuji | won against | TSUBOYA Satoshi |
| ISHIZUKA Hisako | won against | IWASAKA Ryuji |