You can google some of them. Translating nicknames can be pretty difficult though. Also, nicknames can change over time.
- Otake Hideo 美学 (Aesthetics)
- Rin Kaiho 二枚腰 (posture in which the legs are firmly planted in sumo and judo)
- Ishida Yoshio コンピュータ (Computer)
- Takemiya Masaki 宇宙流 (Cosmic style)
- Kato Masao 殺し屋 (Killer)
- Sakata Eio カミソリ (Razor)
- Takagawa Kaku タヌキ (Tanuki)
- Kitani Minoru 怪童丸 (Prodigy, apparently)
- Hashimoto Utaro 火の玉宇太郎 (Fireball Utaro, sounds exciting)
- Kajiwara Takeo ドリル戦法 (Drilling tactics)
- Ohira Shuzo ハンマー (Hammer)
- Miyashita Hidehiro 福島の猛牛 (The Fighting Bull of Fukushima)
- Kudo Norio 眠狂四郎 (???)
- Awaji Shuzo ロッキー (Rocky)
- O Meien 中年の星 (???)
- O Rissei 立誠マジック (Rissei Magic)
- Cho Chikun 七番勝負の鬼 (something like seven-game devil?)
- Hane Yasumasa 中京のダイヤモンド (Diamond of Chukyo)
- Komatsu Hideki 熱血親分 (???)
- Yamashiro Hiroshi 浸透流 (???)
- Yamada Kimio ぶんぶん丸 (???)