Pancrase: King of Pancrase Tournament Opening Round was a mixed martial arts event held by Pancrase Hybrid Wrestling. It took place at Sumo Hall in Tokyo, Japan on December 16, 1994.
The tournament was one of the biggest events in mixed martial arts history to that date and featured some of the best fighters in the world at the time, including future Ultimate Fighting Championship (UFC) champions Bas Rutten, Ken Shamrock, Frank Shamrock, and Maurice Smith, and top Japanese fighters Masakatsu Funaki, Minoru Suzuki and Manabu Yamada.
The King of Pancrase tournament was a two-day tournament spanning from December 16, 1994 to December 17, 1994. The Opening Round and Quarterfinals took place on Day 1 and the Semifinals and Finals took place on Day 2 at the King of Pancrase Tournament Second Round. The winner of the tournament would become the first ever champion of Pancrase.

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