ONE Championship 100: Century took place Saturday, October 12th from the Ryogoku Kokugikan in Tokyo, Japan. The event took place in two parts each targeted towards a different international market.

Part 2 took place in the evening on Saturday in the host city and aired live in the United States on B/R Live in the early morning of Sunday, October 13th.

Main Card (Live on B/R Live, 6:30 AM EST)

-Aung La N Sang defeated Brandon Vera by TKO (Punches, Round 2, 3:23)
-Shinya Aoki defeated Honorio Banario by Submission (Darse choke, Round 1, 0:54)
-Bibiano Fernandes defeated Kevin Belingon by Submission (RNC, Round 2, 2:16)
-Arjan Bhullar defeated Mauro Cerilli by Unanimous Decision

Preliminary Card (Live on B/R Live, 4:00 AM EST)

-Mei Yamaguchi defeated Jenny Huang by Unanimous Decision
-Yosuke Saruta defeated Daichi Kitakata by TKO (Punches, Round 2, 0:59)
-Shoko Sato defeated Rafael Silva by TKO (Punches, Round 2, 4:30)
-Hiroyuki Tetsuka defeated Hernani Perpetuo by Unanimous Decision
-Takasuke Kume defeated Koshi Matsumoto by Unanimous Decision