| Yasuto Sekishima | |
| Birth Place: | Iida, Nagano, Japan |
| Weight: | 167lb |
| Weight Class: | Welterweight |
| Style: | Shoot wrestling, Shoot Boxing, Catch Wrestling, Shooto, Combat Wrestling, |
| Team: | Shooting Gym Narita |
| Years Active: | 1989–1993 |
| Mma Kowin: | 1 |
| Mma Subwin: | 4 |
| Mma Decwin: | 2 |
| Mma Decloss: | 2 |
| Mma Draw: | 4 |
| Sherdog: | 1177 |
Yasuto Sekishima is a Japanese[1] mixed martial artist.[2] 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| 7–2–4| Yuji Ito| Draw| Shooto - Shooto| | align=center| 5| align=center| 3:00| Tokyo, Japan| |-| Win| align=center| 7–2–3| Kazuhiro Kusayanagi| Decision (unanimous)| Shooto - Shooto| | align=center| 5| align=center| 3:00| Tokyo, Japan| |-| Loss| align=center| 6–2–3| Naoki Sakurada| Decision (majority)| Shooto - Shooto| | align=center| 5| align=center| 3:00| Osaka, Japan| |-| Loss| align=center| 6–1–3| Yoshimasa Ishikawa| Decision (unanimous)| Shooto - Shooto| | align=center| 5| align=center| 3:00| Tokyo, Japan| |-| Win| align=center| 6–0–3| Takashi Tojo| Submission (armbar)| Shooto - Shooto| | align=center| 2| align=center| 0:00| Tokyo, Japan| |-| Win| align=center| 5–0–3| Manabu Yamada| KO (punch)| Shooto - Shooto| | align=center| 2| align=center| 0:00| Tokyo, Japan| |-| Draw| align=center| 4–0–3| Naoki Sakurada| Draw| Shooto - Shooto| | align=center| 5| align=center| 3:00| Tokyo, Japan| |-| Win| align=center| 4–0–2| Naoki Sakurada| Decision| Shooto - Shooto| | align=center| 5| align=center| 3:00| Tokyo, Japan| |-| Win| align=center| 3–0–2| Yoshimasa Ishikawa| Submission (rear-naked choke)| Shooto - Shooto| | align=center| 1| align=center| 1:49| Tokyo, Japan| |-| Draw| align=center| 2–0–2| Kenji Kawaguchi| Draw| Shooto - Shooto| | align=center| 5| align=center| 3:00| Tokyo, Japan| |-| Win| align=center| 2–0–1| Yoshimasa Ishikawa| Submission (kimura)| Shooto - Shooto| | align=center| 1| align=center| 2:18| Tokyo, Japan| |-| Win| align=center| 1–0–1| Yuji Ito| Submission (armbar)| Shooto - Shooto| | align=center| 4| align=center| 2:01| Tokyo, Japan| |-| Draw| align=center| 0–0–1| Mitsuo Fujikura| Draw| Shooto - Shooto| | 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: