Isamu Osugi is a Japanese mixed martial artist.
|- | Loss | align=center| 0âÂÂ5 | Kazunari Murakami | Submission (armlock) | Lumax Cup: Tournament of J '96 | | align=center| 1 | align=center| 4:10 | Japan | |- | Loss | align=center| 0âÂÂ4 | Masanori Suda | Submission (armbar) | | | align=center| 2 | align=center| 2:57 | Tokyo, Japan | |- | Loss | align=center| 0âÂÂ3 | Tomoaki Hayama | Submission (guillotine choke) | | | align=center| 2 | align=center| 2:10 | Tokyo, Japan | |- | Loss | align=center| 0âÂÂ2 | Yuichi Otsuka | Submission (armbar) | Lumax Cup: Tournament of J '95 | | align=center| 1 | align=center| 0:42 | Japan | |- | Loss | align=center| 0âÂÂ1 | Rumina Sato | Technical Submission (flying reverse triangle choke) | | | align=center| 1 | align=center| 2:01 | Setagaya, Tokyo, Japan |