Opponents
Kato Masao's main opponents
| Opponent Name | # Games Between Them | Win/Draw/Loss (Win%) | List of Games |
|---|---|---|---|
| Cho Chikun | 107 | 39/1/67 (36.4%) | » |
| Kobayashi Koichi | 103 | 54/0/49 (52.4%) | » |
| Rin Kaiho | 101 | 50/0/51 (49.5%) | » |
| Otake Hideo | 78 | 36/0/42 (46.2%) | » |
| Takemiya Masaki | 60 | 33/0/27 (55.0%) | » |
| Fujisawa Hideyuki | 39 | 25/0/14 (64.1%) | » |
| Sakata Eio | 36 | 21/0/15 (58.3%) | » |
| O Rissei | 34 | 18/0/16 (52.9%) | » |
| Ishida Yoshio | 33 | 24/0/9 (72.7%) | » |
| Kataoka Satoshi | 31 | 23/0/8 (74.2%) | » |
| Yoda Norimoto | 29 | 12/0/17 (41.4%) | » |
| Yamashiro Hiroshi | 27 | 18/0/9 (66.7%) | » |
| O Meien | 26 | 15/0/11 (57.7%) | » |
| Hane Yasumasa | 26 | 16/0/10 (61.5%) | » |
| Hashimoto Shoji | 19 | 11/0/8 (57.9%) | » |
| Kobayashi Satoru | 18 | 11/0/7 (61.1%) | » |
| Hikosaka Naoto | 15 | 8/0/7 (53.3%) | » |
| Hashimoto Utaro | 15 | 10/0/5 (66.7%) | » |
| Ryu Shikun | 15 | 6/0/9 (40.0%) | » |
| Awaji Shuzo | 14 | 10/0/4 (71.4%) | » |
| Nie Weiping | 14 | 6/0/8 (42.9%) | » |
| Ohira Shuzo | 13 | 8/0/5 (61.5%) | » |
| Honda Kunihisa | 13 | 10/0/3 (76.9%) | » |
| Cho U | 13 | 6/0/7 (46.2%) | » |
| Kudo Norio | 11 | 7/0/4 (63.6%) | » |
| Takagi Shoichi | 11 | 8/0/3 (72.7%) | » |
| Ma Xiaochun | 10 | 4/0/6 (40.0%) | » |
| Yamabe Toshiro | 10 | 9/0/1 (90.0%) | » |
| Ishida Akira | 10 | 7/0/3 (70.0%) | » |
| Fujisawa Hosai | 9 | 8/0/1 (88.9%) | » |
| Cho Sonjin | 9 | 7/0/2 (77.8%) | » |
| Tono Hiroaki | 9 | 7/0/2 (77.8%) | » |
| Komatsu Hideki | 8 | 6/0/2 (75.0%) | » |
| Yamada Kimio | 8 | 5/0/3 (62.5%) | » |
| Takagawa Kaku | 8 | 4/0/4 (50.0%) | » |
| Yuki Satoshi | 7 | 5/0/2 (71.4%) | » |
| Hane Naoki | 7 | 4/0/3 (57.1%) | » |
| Sugiuchi Masao | 7 | 5/0/2 (71.4%) | » |
| Yo Kagen | 7 | 6/0/1 (85.7%) | » |
| Ishii Kunio | 7 | 5/0/2 (71.4%) | » |
| Iwata Tatsuaki | 7 | 4/0/3 (57.1%) | » |
| Shiraishi Yutaka | 7 | 7/0/0 (100.0%) | » |
| Shimamura Toshihiro | 6 | 4/0/2 (66.7%) | » |
| Cho Hunhyun | 6 | 2/0/4 (33.3%) | » |
| Takao Shinji | 6 | 3/0/3 (50.0%) | » |
| Sonoda Yuichi | 6 | 5/0/1 (83.3%) | » |
| Lee Changho | 6 | 2/0/4 (33.3%) | » |
| Miyazawa Goro | 6 | 3/0/3 (50.0%) | » |
| Kojima Takaho | 5 | 4/0/1 (80.0%) | » |
| Magari Reiki | 5 | 4/0/1 (80.0%) | » |
| Oyama Kunio | 5 | 4/0/1 (80.0%) | » |
| Yokota Shigeaki | 5 | 3/0/2 (60.0%) | » |
| Mimura Tomoyasu | 5 | 3/0/2 (60.0%) | » |
| Imamura Toshiya | 5 | 4/0/1 (80.0%) | » |
| Yamashita Keigo | 5 | 0/0/5 (0.0%) | » |
| Ishigure Ikuro | 4 | 4/0/0 (100.0%) | » |
| Sato Masaharu | 4 | 4/0/0 (100.0%) | » |
| Shao Weigang | 4 | 3/0/1 (75.0%) | » |
| Go Seigen | 4 | 1/0/3 (25.0%) | » |
| Ushinohama Satsuo | 3 | 2/0/1 (66.7%) | » |
| Kajiwara Takeo | 3 | 3/0/0 (100.0%) | » |
| Yukawa Mitsuhisa | 3 | 3/0/0 (100.0%) | » |
| Sakaguchi Ryuzo | 3 | 3/0/0 (100.0%) | » |
| Liu Xiaoguang | 3 | 2/0/1 (66.7%) | » |
| Kato Atsushi | 3 | 3/0/0 (100.0%) | » |
| Nakamura Hidehito | 3 | 3/0/0 (100.0%) | » |
| Haruyama Isamu | 3 | 3/0/0 (100.0%) | » |
| Seo Bongsoo | 3 | 2/0/1 (66.7%) | » |
| Morita Michihiro | 3 | 1/0/2 (33.3%) | » |
| Sakakibara Shoji | 2 | 2/0/0 (100.0%) | » |
| Kada Katsuji | 2 | 2/0/0 (100.0%) | » |
| Miyamoto Naoki | 2 | 2/0/0 (100.0%) | » |
| Kiyonari Tetsuya | 2 | 0/0/2 (0.0%) | » |
| Sekiyama Toshio | 2 | 2/0/0 (100.0%) | » |
| Chin Kaei | 2 | 1/0/1 (50.0%) | » |
| Chino Tadahiko | 2 | 2/0/0 (100.0%) | » |
| Kubouchi Shuchi | 2 | 1/0/1 (50.0%) | » |
| Nakano Hironari | 2 | 2/0/0 (100.0%) | » |
| Hisai Keishi | 2 | 1/0/1 (50.0%) | » |
| Miyamoto Yoshihisa | 2 | 2/0/0 (100.0%) | » |
| Tei Meiko | 2 | 2/0/0 (100.0%) | » |
| Kamimura Kunio | 2 | 1/0/1 (50.0%) | » |
| Sakai Takeshi | 2 | 2/0/0 (100.0%) | » |
| Kamimura Haruo | 2 | 1/0/1 (50.0%) | » |
| Nakano Yasuhiro | 2 | 0/0/2 (0.0%) | » |
| Oya Koichi | 2 | 1/0/1 (50.0%) | » |
| Akiyama Jiro | 2 | 0/0/2 (0.0%) | » |
| Kubo Katsuaki | 2 | 1/0/1 (50.0%) | » |
| Kono Rin | 2 | 1/0/1 (50.0%) | » |
| Ishii Mamoru | 2 | 2/0/0 (100.0%) | » |
| Gu Li | 2 | 1/0/1 (50.0%) | » |
| Takahara Shuji | 2 | 2/0/0 (100.0%) | » |
| An Joyeong | 2 | 2/0/0 (100.0%) | » |
Opponents with only one game omitted from the list.
