Koji Oishi
| First Name : | Koji |
| Last name : | Oishi |
| Height : | 5'7" (173cm) |
| Weight : | 155 lbs (70 kg) |
| Birth Date : | 1977-05-31 |
| City : | Tokyo |
| Country : | Japan |
| Record : | 8 - 4 - 0 (Wins - Losses - Draws) |
| Wins : |
1 KO (12.50%) 4 Decision (Unanimous) (50%) 1 KO (Punch) (12.50%) 1 Draw (Majority) (12.50%) 1 Decision (Majority) (12.50%) |
| Losses : |
1 Decision (Unanimous) (25%) 1 TKO (Doctor Stoppage) (25%) 1 Decision (Majority) (25%) 1 KO (Punches) (25%) |
| Association : | PANCRASEism |
| Match Stats | ||||||
| Result | Opponent | Method | Event Title | Date | Round | Time |
| Win | Hyung Kwang Kim | Decision (Majority) | Pancrase - Changing Tour 3 | Jun 7, 2009 | 2 | 5:00 Sec |
| Win | Naoyuki Kotani | Decision (Unanimous) | Pancrase - Shining 8 | Oct 1, 2008 | 3 | 5:00 Sec |
| Win | Karen Darabedyan | Decision (Unanimous) | PFP - Ring of Fire | Dec 9, 2007 | 3 | 5:00 Sec |
| Win | Chris Ade | KO | Bodog Fight - Vancouver | Aug 25, 2007 | 3 | 0:44 Sec |
| Win | In Seok Kim | KO (Punch) | Pancrase - Blow 9 | Oct 25, 2006 | 1 | 2:31 Sec |
| Lost | Carlos Condit | TKO (Doctor Stoppage) | Pancrase - 2006 Neo-Blood Tournament Finals | Jul 28, 2006 | 3 | 1:01 Sec |
| Win | Nate Diaz | Decision (Unanimous) | Pancrase - 2005 Neo-Blood Tournament Finals | Aug 27, 2005 | 3 | 5:00 Sec |
| Lost | Nick Diaz | KO (Punches) | UFC 53 - Heavy Hitters | Jun 4, 2005 | 1 | 1:24 Sec |
| Win | Yuji Hoshino | Draw (Majority) | Pancrase - Brave 4 | Apr 23, 2004 | 3 | 5:00 Sec |
| Win | Daisuke Hanazawa | Decision (Unanimous) | Pancrase - Hybrid 5 | May 18, 2003 | 2 | 5:00 Sec |
| Lost | Kiuma Kunioku | Decision (Unanimous) | Pancrase - 2002 Neo-Blood Tournament Opening Round | Jul 28, 2002 | 3 | 5:00 Sec |
| Lost | LaVerne Clark | Decision (Majority) | UFC 25 - Ultimate Japan 3 | Apr 14, 2000 | 3 | 5:00 Sec |