Ajigawa (Japanese: 安治川) is a toshiyori (an elder of the Japan Sumo Association). The name is now owned by Aminishiki, who is still an active rikishi. It is being borrowed by former maegashira Kōbō, who retired in December 2007. He is correctly addressed as Ajigawa-oyakata.
| Generation | Name at retirement | Highest rank | Stable | Period | Remarks |
|---|---|---|---|---|---|
| 1st | Tomoegata Seiichi | komusubi | Takashima-Tomozuna | 1943.1-1951.5 | became 9th Takashima-oyakata |
| 2nd | Ichinishiki Shūnosuke | jūryō 7 | Takashima | 1953.5-1976.3 | became 9th Tomozuna-oyakata |
| 3rd | Mutsuarashi Yukio | sekiwake | Miyagino | 1976.3-1993.4 (retired) | |
| 4th | Asahifuji Seiya | yokozuna | Ōshima | 1993.4-2007.11 | became 9th Isegahama-oyakata |
| 5th | Kōbō Kenichi | maegashira | Miyagino | 2007.11- |