Yasuto Sekishima is a Japanese mixed martial artist. He competed in the Welterweight division. He was the inaugural Shooto Middleweight Champion.
Sekishima trained under Satoru Sayama at the Super Tiger Gym. He was originally a judoka and also trained in shootboxing under Caesar Takeshi and combat wrestling under Noriaki Kiguchi and debuted as an amateur before Shooto's professional years. He would debut as a professional in 1989 to a draw to Mitsuo Fujikura.
|- | Draw | align=center| 7âÂÂ2âÂÂ4 | Yuji Ito | Draw | | | align=center| 5 | align=center| 3:00 | Tokyo, Japan | |- | Win | align=center| 7âÂÂ2âÂÂ3 | Kazuhiro Kusayanagi | Decision (unanimous) | | | align=center| 5 | align=center| 3:00 | Tokyo, Japan | |- | Loss | align=center| 6âÂÂ2âÂÂ3 | Naoki Sakurada | Decision (majority) | | | align=center| 5 | align=center| 3:00 | Osaka, Japan | |- | Loss | align=center| 6âÂÂ1âÂÂ3 | Yoshimasa Ishikawa | Decision (unanimous) | | | align=center| 5 | align=center| 3:00 | Tokyo, Japan | |- | Win | align=center| 6âÂÂ0âÂÂ3 | Takashi Tojo | Submission (armbar) | | | align=center| 2 | align=center| 0:00 | Tokyo, Japan | |- | Win | align=center| 5âÂÂ0âÂÂ3 | Manabu Yamada | KO (punch) | | | align=center| 2 | align=center| 0:00 | Tokyo, Japan | |- | Draw | align=center| 4âÂÂ0âÂÂ3 | Naoki Sakurada | Draw | | | align=center| 5 | align=center| 3:00 | Tokyo, Japan | |- | Win | align=center| 4âÂÂ0âÂÂ2 | Naoki Sakurada | Decision | | | align=center| 5 | align=center| 3:00 | Tokyo, Japan | |- | Win | align=center| 3âÂÂ0âÂÂ2 | Yoshimasa Ishikawa | Submission (rear-naked choke) | | | align=center| 1 | align=center| 1:49 | Tokyo, Japan | |- | Draw | align=center| 2âÂÂ0âÂÂ2 | Kenji Kawaguchi | Draw | | | align=center| 5 | align=center| 3:00 | Tokyo, Japan | |- | Win | align=center| 2âÂÂ0âÂÂ1 | Yoshimasa Ishikawa | Submission (kimura) | | | align=center| 1 | align=center| 2:18 | Tokyo, Japan | |- | Win | align=center| 1âÂÂ0âÂÂ1 | Yuji Ito | Submission (armbar) | | | align=center| 4 | align=center| 2:01 | Tokyo, Japan | |- | Draw | align=center| 0âÂÂ0âÂÂ1 | Mitsuo Fujikura | Draw | | | align=center| 5 | align=center| 3:00 | Tokyo, Japan |
|- style="background:#FFBBBB;" | 2001-6-3|| Loss ||align=left| Kunihide Onose || NKB || Tokyo, Japan || TKO (3 knockdown rule) || 3 || 1:52 |- style="background:#FFBBBB;" | 2001-3-25|| Loss ||align=left| Takahiro Seo || APKF || Yokohama, Japan || TKO (Low kick) || 4 || 0:36 |- style=" | 1994-5-17|| - ||align=left| Yudai Watanabe || MAJKF || Tokyo, Japan || - || - || - |- style="background:#FFBBBB;" | 1994-1-22|| Loss ||align=left| Adam Watt || MAJKF || Tokyo, Japan || KO || - || - |- |- | colspan=9 | Legend: