UFC 23: Ultimate Japan 2 è un evento di MMA del 19 novembre 1999. Si tiene a Tokyo Bay NK Hall, Chiba, Japan. Qui trovi la card completa con i risultati degli incontri.
| Categoria | Incontro | Esito |
|---|---|---|
| Main Card | ||
| Heavyweight | Kevin Randleman vs Pete Williams | Decision (unanimous) R5 5:00 |
| Heavyweight | Pedro Rizzo vs Tsuyoshi Kosaka | TKO (referee stoppage due to strikes) R3 1:12 |
| Middleweight | Joe Slick vs Jason DeLucia | TKO (verbal submission due to knee injury) R1 1:12 |
| Middleweight | Eugene Jackson vs Keiichiro Yamamiya | KO (punch) R3 3:12 |
| Middleweight | Kenichi Yamamoto vs Katsuhisa Fujii | Submission (kneebar) R1 4:15 |
| Middleweight | Katsuhisa Fujii vs Masutatsu Yano | TKO (referee stoppage due to strikes) R2 3:12 |
| Middleweight | Kenichi Yamamoto vs Daiju Takase | Decision (unanimous) R3 5:00 |