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| O Rissei vs. Cho Chikun | |||
| Date | Venue | Result | |
| 1st | March 08 | Niigata | Cho Chikun (W) won by resign. |
| 2nd | March 08 | Aichi | Cho Chikun (B) won by 2.5. |
| 3rd | April 05 | Nagano | Yamashita Keigo(B) won by resign. |
| 4th | April 19 | Ehime | Yamashita Keigo(W) won by resign. |
| 5th | April 25 | Tokyo | Cho Chikun (B) won by 3.5. |
| Final | |||
| Date | Players | Venue | Result |
| Feb. 15, 2006 | Yamashita Keigo Yoda Norimoto |
Nihon Kiin | Yamashita Keigo (B) won by 6.5. |
| The 45th Judan Tournament | ||||||||
| Player | Round 1 | Round 2 | Round 3 | Round 4 | ||||
| Kobayashi Satoru | 1 | Kobayashi S 6/15 |
9 | Kobayashi S 7/15 |
13 | Yamashita 9/21 |
15 | Yamashita 10/2 |
| So Yokoku | ||||||||
| Yamashiro Hiroshi | 2 | Kim Sujun 5/11 |
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| Kim Sujun | ||||||||
| Sakai Takeshi | 3 | Yoda 6/15 |
10 | Yamashita 8/10 |
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| Yoda Norimoto | ||||||||
| Kobayashi Koichi | 4 | Yamashita 6/15 |
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| Yamashita Keigo | ||||||||
| Cho U | 5 | Cho U 5/22 |
11 | Cho U 6/22 |
14 | Cho U 9/4 |
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| Takao Shinji | ||||||||
| Otake Hideo | 6 | Komatsu 5/11 |
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| Komatsu Hideki | ||||||||
| Yamada Kimio | 7 | Yamada 6/22 |
12 | Yamada 7/27 |
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| Mimura Tomoyasu | ||||||||
| Hane Naoki | 8 | O Rissei 6/1 |
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| O Rissei | ||||||||
| The 45th Judan Tournament (losers'tournament) | ||||||
| Player | Round 1 | Round 2 | Round 3 | Round 4 | Round 5 | |
| 1 | So Yokoku | Yamashiro 7/20 |
Yamashiro 8/24 |
Takao 11/16 |
Cho 12/14 |
Yoda 12/25 |
| 2 | Yamashiro Hiroshi | |||||
| 3 | Sakai Takeshi | Kobayashi K 7/13 |
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| 4 | Kobayashi Koichi | |||||
| 5 | Takao Shinji | Takao 7/20 |
Takao 10/26 |
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| 6 | Otake Hideo | |||||
| 7 | Mimura Tomoyasu | Hane 7/13 |
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| 8 | Hane Naoki | |||||
| 15 | Cho U | |||||
| 9 | Kim Sujun | Yoda 9/14 |
Yoda 10/26 |
Yoda 11/16 |
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| 10 | Yoda Norimoto | |||||
| 11 | Komatsu Hideki | Komatsu 8/31 |
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| 12 | O Rissei | |||||
| 13 | Kobayashi Satoru | Kobayashi 10/12 |
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| 14 | Yamada Kimio | |||||