Ratings
ISHIBARA Kotaro (Japan)Japanese name(s): 石原涼太郎
22 tournaments
136 results
Rated 339 in Japan and T399 in Asia&Oceania&Africa and T476 in the World
Latest rating: 1888
136 results
Rated 339 in Japan and T399 in Asia&Oceania&Africa and T476 in the World
Latest rating: 1888
2019-10-27: 48_All_Japan_Chubu_prelim(Japan)
2019-09-15: 9_team_Shinagama_open_3(Japan)
2019-09-14: 11_Tokyo_open(Japan)
2019-09-01: 60_Nagoya_open(Japan)
2019-08-25: 4_Nankai_open(Japan)
2019-08-10: 47_Inuyama_open(Japan)
2019-07-14: 14_Ouza_sen(Japan)
2019-07-13: 18_Hokuetsu_open(Japan)
2019-05-05: 31_Kyoto_open(Japan)
2019-05-03: 46_Inuyama_open_afternoon(Japan)
2019-05-02: 46_Inuyama_open_morning(Japan)
2019-04-20: 59_Nagoya_open(Japan)
2019-03-24: 40_Meijin(Japan)
2019-03-03: 45_Inuyama_open(Japan)
2019-02-03: 2019_Chibu_expert_games(Japan)
2019-01-19: 35_Suzuka_open(Japan)
| YOSHIYUKI Suganuma | 44-20 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 48-16 | HATTORI Kouki |
| ISHIBARA Kotaro | 44-20 | TSUKAMOTO Hiroaki |
| YAMANAKA Yukihiro | 52-12 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 41-23 | WAKITA Kengo |
| KOYASHIKI Ken | 41-23 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 43-21 | KATSUHISA Tomohiko |
| WATANABE Kiriya | 43-21 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 44-20 | FUJII Renya |
| ISHIBARA Kotaro | 34-30 | ITO Itsuru |
| ONUKI Yutaka | 35-29 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 33-31 | MITANI Koutarou |
| ADACHI Shungai | 37-27 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 61-03 | AKINAGA Yuuji |
| ISHIBARA Kotaro | 48-16 | TAKAHASHI Shiu |
| OGINO Takeru | 33-31 | ISHIBARA Kotaro |
| IDA Hiroaki | 47-17 | ISHIBARA Kotaro |
| YAMAGUCHI Hironobu | 35-29 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 44-20 | UNO Toshihiro |
| KATOKO Isamu | 34-30 | ISHIBARA Kotaro |
| KOZUKA Katsuhiko | 44-20 | ISHIBARA Kotaro |
| MIYAGAWA Keigo | 46-18 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 39-25 | OKUTAIRA Akio |
| TAKAHASHI Akihiro | 43-21 | ISHIBARA Kotaro |
| TOMINAGA Tomoki | 37-27 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 43-21 | IMAI Hiroki |
| ISHIBARA Kotaro | 50-14 | KUWAKAKI Koutarou |
| TAGUCHI Amane | 51-13 | ISHIBARA Kotaro |
| NORIMITSU Ayumi | 39-25 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 39-25 | OKADA Tadakawa |
| ISHIBARA Kotaro | 41-23 | OKAMOTO Harumi |
| NAGAO Hiroto | 47-17 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 40-24 | OKUTAIRA Fuyumi |
| ISHIBARA Kotaro | 41-23 | HAGA Kazutoshi |
| ISHIBARA Kotaro | 36-28 | KATOKO Isamu |
| NAGAO Hiroto | 50-14 | ISHIBARA Kotaro |
| MURAKAMI Takeshi | 47-17 | ISHIBARA Kotaro |
| WADA Masaki | 47-17 | ISHIBARA Kotaro |
| IKEGAYA Mao | 38-26 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 33-31 | ISHIKAWA Akira |
| KITAJIMA Hideki | 43-21 | ISHIBARA Kotaro |
| URANO Kento | 44-20 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 40-24 | KOSHIGAWARA Mitsuki |
| ISHIBARA Kotaro | 36-28 | TAGUCHI Amane |
| MATSUMOTO Hiroshi | 34-30 | ISHIBARA Kotaro |
| SANO Kaoru | 41-23 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 53-11 | IKEHATA Keiko |
| SHIUMI Tsutomu | 37-27 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 44-20 | TAGUCHI Amane |
| ISHIBARA Kotaro | 35-29 | KAGAWA Yoichi |
| ISHIBARA Kotaro | 34-30 | YAMAZAKI Keita |
| SUGASE Takahiro | 46-18 | ISHIBARA Kotaro |
| TAGUCHI Mika | 48-16 | ISHIBARA Kotaro |
| TANIGUCHI Masaki | 42-22 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 36-28 | UEDA Takashi |
| ISHIBARA Kotaro | 45-19 | KOGA Shingo |
| ISHIBARA Kotaro | 43-21 | OKUTAIRA Akio |
| OKAMOTO Harumi | 36-28 | ISHIBARA Kotaro |
| ARIMOTO Masa | 33-31 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 39-25 | TANAKA Junji |
| YOSHIYUKI Suganuma | 37-27 | ISHIBARA Kotaro |
| OKAMOTO Harumi | 34-30 | ISHIBARA Kotaro |
| YOSHIYUKI Suganuma | 40-24 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 56-08 | HASHIMOTO Tokuya |
| ISHIBARA Kotaro | 42-22 | TAKIGAWA Mitsuaki |
| OKUTAIRA Akio | 37-27 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 49-15 | TSUKAMOTO Hiroaki |
| ISHIBARA Kotaro | 42-22 | KAWASOE Ousuke |
| ISHIBARA Kotaro | 50-14 | NAGASHIMA Yoshitaka |
| SHIMO Sato | 41-23 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 44-20 | HASHIMOTO Tokuya |
| TAKAHASHI Akihiro | 50-14 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 39-25 | MIYAGAWA Keigo |
| TSUKAMOTO Hiroaki | 57-07 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | won against | TOMI Kazuko |
| MIYAZAKI Toru | won against | ISHIBARA Kotaro |
| ISHIBARA Kotaro | won against | HASHIMOTO Yuya |
| NAKAOKA Akinori | won against | ISHIBARA Kotaro |
| OCHIAI Kenta | won against | ISHIBARA Kotaro |
| ISHIBARA Kotaro | won against | TAKIGAWA Mitsuaki |
| YAMAZAKI Keita | won against | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 54-10 | OKUTAIRA Fuyumi |
| NAGASHIMA Kouyou | 35-29 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 38-26 | TAGUCHI Mika |
| YOSHIYUKI Suganuma | 41-23 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 49-15 | NAGASHIMA Yoshitaka |
| ISHIBARA Kotaro | 58-06 | OKUTAIRA Akio |
| NAGASHIMA Kouyou | 33-31 | ISHIBARA Kotaro |
| KAWARADA Yuichi | 39-25 | ISHIBARA Kotaro |
| KANOU Eishi | 44-20 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 40-24 | TSUKAMOTO Hiroaki |
| HARA Shuichi | 33-31 | ISHIBARA Kotaro |
| YOSHIYUKI Suganuma | 37-27 | ISHIBARA Kotaro |
| TANAKA Keisuke | 36-28 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 41-23 | KOMINE Ryonobu |
| ISHIBARA Kotaro | won against | KAWARADA Yuichi |
| ISHIBARA Kotaro | 43-21 | NISHII Kensuke |
| ISHIBARA Kotaro | 48-16 | NAGASHIMA Yoshitaka |
| TAKAGI Yosuke | 39-25 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 36-28 | SUGIYAMA Toshio |
| NAGASHIMA Kouyou | 40-24 | ISHIBARA Kotaro |
2018-12-02: 44_Inuyama_open(Japan)
2018-12-01: 58_Nagoya_open(Japan)
2018-09-23: 47_All_Japan_Chubu_prelim(Japan)
2018-08-11: 43_Inuyama_open(Japan)
2018-05-05: 42_Inuyama_open_morning(Japan)
2018-04-28: 57_Nagoya_open(Japan)
| KATOKO Isamu | 43-21 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 51-13 | ISHIDA Hiroto |
| TAYAMA Tsubasa | 38-26 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 52-12 | OKADA Tadakawa |
| ADACHI Shungai | 49-15 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 39-25 | YAMANAKA Yukihiro |
| KATOKO Isamu | 44-20 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 51-13 | KAWASOE Ousuke |
| ISHIBARA Kotaro | 44-20 | FUJIMOTO Kenta |
| ISHIBARA Kotaro | 43-21 | KATOKO Isamu |
| ISHIBARA Kotaro | 41-23 | ONO Hideki |
| ISHIBARA Kotaro | 35-29 | HATTORI Kouki |
| ISHIBARA Kotaro | 44-20 | NAGASHIMA Nobuko |
| SOBAJIMA Daichi | 49-15 | ISHIBARA Kotaro |
| HASHIMOTO Yuya | 35-29 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 43-21 | TSUCHIDA Daisuke |
| ISHIBARA Kotaro | 34-30 | HARA Shuichi |
| HATTORI Kouki | 43-21 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 40-24 | OHIKE Yoshinori |
| UNO Toshihiro | 43-21 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 33-31 | YOSHIYUKI Suganuma |
| ISHIBARA Kotaro | 35-29 | TSUKAMOTO Hiroaki |
| MIYAGAWA Keigo | 53-11 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 34-30 | ESAKI Sachiji |
| ISHIBARA Kotaro | 43-21 | UNO Toshihiro |
| HATTORI Kouki | 37-27 | ISHIBARA Kotaro |
| HARA Shuichi | 49-15 | ISHIBARA Kotaro |
| TSUKAMOTO Hiroaki | 54-10 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 49-15 | ARAKAWA Shuma |
| HATTORI Kouki | 37-27 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 34-30 | ONO Hideki |
| ESAKI Sachiji | 52-12 | ISHIBARA Kotaro |
| ISHIBARA Kotaro | 33-31 | MAESAWA Nobu |
| ISHIBARA Kotaro | 48-16 | KATOKO Takahiro |
| ISHIBARA Kotaro | 33-31 | OHIRA Takuhiro |