Koji Horiguchi
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| Koji Horiguchi 8-dan | |
|---|---|
| Native name | 堀口弘治 |
| Date of Birth | 16 May 1961 |
| Place of Birth | Chofu City, Tokyo Metropolis |
| Teacher | Hiroji Kato 9-dan |
| Tournament | Wins |
|---|---|
| Young Lions | 1 title (term 8) |
| Rank | Date |
|---|---|
| 6-kyu | 1976 |
| 1-dan | 1978 |
| 4-dan | 3 February 1982 |
| 5-dan | 1 April 1986 |
| 6-dan | 31 March 1992 |
| 7-dan | 16 December 2003 |
| Retired | 1 June 2017 |
| 8-dan | 1 April 2024 |