RIZIN LANDMARK 16 in NAGASAKI was a mixed martial arts and kickboxing event held by the RIZIN Fighting Federation on Saturday, October 3, 2026, at the HAPPINESS ARENA in Nagasaki Stadium City, Nagasaki, Japan, marking the promotion's first event in Nagasaki Prefecture. In the main event, hometown fighter Yoshinori Horie faced Sho Patrick Usami in a 71 kg MMA bout, while Viktor Kolesnik took on Koyomi Matsushima at 66 kg. The card also featured Ryusei Ashizawa vs. Seiya Inoue, Kate Lotus vs. NOEL and Ryan Cafaro vs. Hyuma Yasui, along with four opening fights, three of them contested under kickboxing rules.
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