| Event Details | |
|---|---|
| Organization | Ultimate Fighting Championship |
| Name | UFC 23 - Ultimate Japan 2 |
| Date | November 19th, 1999 |
| Venue | Tokyo Bay N.K. Hall |
| Location | Urayasu, Chiba, Japan |
| Fight #1 | |
|---|---|
| Open Weight Bout | |
  |
|
| Katsuhisa Fujii | Masutatsu Yano |
| Katsuhisa Fujii via TKO (Punches) | |
| Time Round 2 @ 3:12 |
Referee Mario Yamasaki |
| Fight #2 | |
|---|---|
| Open Weight Bout | |
|
|
| Kenichi Yamamoto | Daiju Takase |
| Kenichi Yamamoto via Decision (Unanimous) | |
| Time Round 3 @ 5:00 |
Referee Mario Yamasaki |
| Fight #3 | |
|---|---|
| Light Heavyweight Bout | |
 |
|
| Eugene Jackson | Keiichiro Yamamiya |
| Eugene Jackson via KO (Punch) | |
| Time Round 3 @ 3:12 |
Referee John McCarthy |
| Fight #4 | |
|---|---|
| Light Heavyweight Bout | |
|
|
| Joe Slick | Jason DeLucia |
| Joe Slick via TKO (Knee Injury) | |
| Time Round 1 @ 1:12 |
Referee John McCarthy |
| Fight #5 | |
|---|---|
 Ultimate Japan 2 Heavyweight Tournament Title Bout |
|
|
|
| Kenichi Yamamoto | Katsuhisa Fujii |
| Kenichi Yamamoto via Submission (Kneebar) | |
| Time Round 1 @ 4:15 |
Referee John McCarthy |
| Fight #6 | |
|---|---|
| Heavyweight Bout | |
 |
|
| Pedro Rizzo | Tsuyoshi Kosaka |
| Pedro Rizzo via TKO (Punches) | |
| Time Round 3 @ 1:12 |
Referee John McCarthy |
| Fight #7 | |
|---|---|
| UFC Heavyweight Title Bout |
|
|
|
| Kevin Randleman | Pete Williams |
| Kevin Randleman via Decision (Unanimous) | |
| Time Round 5 @ 5:00 |
Referee John McCarthy |