Games of Cho Chikun against Iwata Tatsuaki
| Nr. | Date | Event & Result | Mvs |
|---|---|---|---|
| 1 | 1969-09-25 | 7th Pro Best Ten, Preliminary (W, B+R) | 149 |
| 2 | 1977-10-27 | 3rd Meijin, Final Preliminary, Semi-final (B, B+R) | 125 |
| 3 | 1983-11-10 | 39th Honinbo League (B, W+R) | 154 |
| 4 | 1984/1985 | 17th Hayago Championship, Round 1 (?, +) | ? |
| 5 | 1985-09-05 | 41st Honinbo, 3rd League-entry preliminary, final (B, B+R) | 199 |
| 6 | 1992-07-02 | 17th Meijin League (W, W+4.5) | 262 |
| 7 | 1998-07/08 | 5th Acom Cup, Round 2 (?, +) | ? |