Saikouisen Nihon Pro Mahjong
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| Country | Japan |
|---|---|
| Inception | 1976 |
| Leader | Mr. Kiyoshi Niitsu, Representative |
| Members | 783 |
The Saikouisen Nihon Pro Mahjong association (「最高位戦日本プロ麻雀協会」 Saikōisen Nihon Puro Mājan Kyōkai, informally called "Saikouisen") is a professional organization of competitive mahjong players.
Membership
As of May 2024, Saikouisen currently has 783 members.
Game rules
Saikouisen has changed their game rules in 2023. While the core of the rules seems to not have changed much, the treatment of penalties seems to have been significantly altered compared to past editions.
- 2023 rules [ja]: https://saikouisen.com/pdf/230126regulations
- 2000 rules [en]: https://www.mjstars.net/_files/ugd/a08886_31822aadd41a410791fee02471b681f0.pdf
- 2000 rules [ja]: https://saikouisen.com/pdf/171211kitei
Title matches
The Saikouisen promotes a variety of titles contested under different rulesets.[1] As of February 2025, those titles are:
| Title match | Est. | Current champion | |||
|---|---|---|---|---|---|
| Japanese | Romanized | Japanese | Romanized | Edition | |
| Major titles | |||||
| 最高位戦 | Saikōisen[2] | 1976 | 石井 一馬 | Kazuma Ishii | 49th (2024) |
| 飯田正人杯・最高位戦Classic | Masahito Iida Cup Saikōisen Classic[3] Iida Masahito Hai Saikōisen Kurashikku |
2006 | 18th (2024) | ||
| 發王戦 | Ryūōsen | 1992 | 寿（とし） | Toshi | 32nd (2024) |
| 新輝戦 | Shinkisen | 2017 | 田中 祥平 | Shohei Tanaka | 8th (2024) |
| 蒼翼戦 | Sōyokusen | 2025 | 石井 一馬 | Kazuma Ishii | 1st (2025) |
| Women's titles | |||||
| 女流最高位戦 | Joryū Saikōisen[4] |
2001 | 瑞原 明奈 | Akina Mizuhara | 24th (2024) |
| 女流名人戦 | Joryū Meijinsen | 1984[5] | 谷崎 舞華 | Maika Tanizaki | 24th (2024) |
| Other titles | |||||
| 新人王戦 | Shinjin'ōsen | 2012[6] | 高倉 拓馬 | Takuma Takakura | 49th (2024) |
| 関西王者決定戦 | Kansai Championship Kansai Ōja Ketteisen |
2017 | 酒井 一興 | Kazuoki Sakai | 7th (2023) |
| 北海道王者決定戦 | Hokkaido Championship Hokkaidō Ōja Ketteisen |
2019 | 本間 健滋 | Kenji Honma | 6th (2024) |
| アマ最高位戦 | Amateur Saikōisen Ama Saikōisen |
2003 | 小西 隆之 | Takayuki Konishi | 19th (2023) |
M.League Players
15 (10 current, 5 former) members have been drafted into four out of the nine M.League teams.
| Player | Team | Seasons | |
|---|---|---|---|
| Japanese | Romanized | ||
| 園田賢 | Ken Sonoda | Akasaka Drivens | 2018–present |
| 鈴木たろう | Taro Suzuki | Akasaka Drivens | 2018–present |
| 浅見真紀 | Maki Asami | Akasaka Drivens | 2023–present |
| 渡辺太 | Futoshi Watanabe | Akasaka Drivens | 2023–present |
| 日向藍子 | Aiko Hinata | Shibuya Abemas | 2019–present |
| 茅森早香 | Sayaka Kayamori | SegaSammy Phoenix | 2018–present |
| 醍醐大 | Hiroshi Daigo | SegaSammy Phoenix | 2023–present |
| 竹内元太 | Genta Takeuchi | SegaSammy Phoenix | 2024–present |
| 瑞原明奈 | Akina Mizuhara | U-Next Pirates | 2019–present |
| 鈴木優 | Yu Suzuki | U-Next Pirates | 2022–present |
| 近藤誠一 | Seiichi Kondo | SegaSammy Phoenix | 2018–2022 (player) 2023–present (coach) |
| 村上淳 | Jun Murakami | Akasaka Drivens | 2018–2022 |
| 丸山奏子 | Kanako Maruyama | Akasaka Drivens | 2019–2022 |
| 朝倉康心 | Koushin Asakura | U-Next Pirates | 2018–2021 |
| 石橋伸洋 | Nobuhiro Ishibashi | U-Next Pirates | 2018–2021 |
References
- ↑ Saikouisen title matches
- ↑ The final is referred to as the Saikōi Ketteisen 「最高位決定戦」
- ↑ Simply known as the Saikōisen Classic until 2013, when it was renamed following the death of Masahito Iida, recognized as "Lifetime Champion" (「永世最高位」 Eisei Saikōi)
- ↑ The final is referred to as the Joryū Saikōi Ketteisen 「女流最高位決定戦」
- ↑ Organized by the Monthly Professional Mahjong magazine; sponsored by the Saikouisen since 2015
- ↑ Until 2012, the title was awarded to the winner of the B1 League.