UFC 23
| UFC 23: Ultimate Japan 2 | ||||
|---|---|---|---|---|
 The poster for UFC 23: Ultimate Japan 2 | ||||
| Promotion | Ultimate Fighting Championship | |||
| Date | November 19, 1999 | |||
| Venue | Tokyo Bay NK Hall | |||
| City | Tokyo, Japan | |||
| Event chronology | ||||
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UFC 23: Ultimate Japan 2 was a mixed martial arts event held by the Ultimate Fighting Championship on November 19, 1999 at Tokyo Bay NK Hall in Tokyo, Japan.
UFC 23 was the last UFC event to feature a one-night tournament, marking the end of the tournament format that had characterized many of the promotion's early events.