OFICIAL ONE Championship

ONE SAMURAI Featherweight Kickboxing Tournament Semifinals Set For ONE SAMURAI 4

What happened
Based on ONE Championship · Aug 21, 2026

ONE SAMURAI 4 in Tokyo on October 17 will feature the semifinals of the ONE SAMURAI Featherweight Kickboxing Tournament, with Marat Grigorian vs. Luo Chao and Masaaki Noiri vs. Mohammad Siasarani.

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ONE SAMURAI Featherweight Kickboxing Tournament Semifinals Set For ONE SAMURAI 4
ONE Championship — ONE Championship
Key points
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The ONE SAMURAI Featherweight Kickboxing Tournament quarterfinals produced non-stop drama across two stacked cards, and the semifinals will deliver even more when ONE SAMURAI 4 touches down inside Tokyo’s Ariake Arena on Saturday, October 17.
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Grigorian – a former ONE Featherweight Kickboxing World Title challenger – booked his ticket to the semifinals with a commanding performance against Mamuka Usubyan at The Inner Circle 25 on August 7.
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The Armenian knockout artist put his trademark pressure on display, giving the Russian warrior zero room for comfort throughout their nine-minute clash in Bangkok’s Lumpinee Stadium.
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As a result, the Hemmers Gym veteran walked away with a comfortable unanimous decision, which improved his slate to 71-14 and extended his win streak to four on the global stage.
Key numbers
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Grigorian improved to 71-14 and extended his global win streak to four.
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The victory earned Noiri a US$100,000 performance bonus from ONE Chairman and CEO Chatri Sityodtong.
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Noiri, now 52-14, will face Mohammad Siasarani, who secured his spot with a first-round high-kick knockout of Kaito.

ONE SAMURAI 4, scheduled for Saturday, October 17 at Tokyo’s Ariake Arena, will host the semifinals of the ONE SAMURAI Featherweight Kickboxing Tournament. The event features two high-stakes matchups: Marat Grigorian against Luo Chao, and Masaaki Noiri facing Mohammad Siasarani. Both bouts follow quarterfinal victories that showcased the fighters’ contrasting styles and resilience under pressure. The tournament’s winner will earn a title shot against the reigning ONE Featherweight Kickboxing World Champion, Superbon.

Marat Grigorian, a three-time Glory Kickboxing World Champion, secured his semifinal spot with a dominant unanimous decision over Mamuka Usubyan at The Inner Circle 25 on August 7. The Armenian fighter applied relentless pressure throughout the bout, limiting Usubyan’s offensive opportunities in a nine-minute contest at Lumpinee Stadium. Grigorian improved to 71-14 and extended his global win streak to four. His opponent, Luo Chao, defeated Kosuke Takagi by unanimous decision at ONE SAMURAI 2 on August 8, demonstrating adaptability and striking power in a closely contested fight.

Masaaki Noiri advanced to the semifinals with a first-round knockout of Liu Mengyang at ONE SAMURAI 2, avenging a prior loss. The victory earned Noiri a US$100,000 performance bonus from ONE Chairman and CEO Chatri Sityodtong. Noiri, now 52-14, will face Mohammad Siasarani, who secured his spot with a first-round high-kick knockout of Kaito. Siasarani extended his active win streak to six across Muay Thai and kickboxing and holds a flawless 6-0 record in ONE promotional kickboxing.

The event also features title defenses for ONE Atomweight Muay Thai World Champion Nadaka against Rifdean Masdor and ONE Bantamweight Kickboxing World Champion Jonathan Haggerty against Hiroki Akimoto. The semifinals promise explosive finishes, with both Grigorian vs. Luo Chao and Noiri vs. Siasarani delivering contrasting yet high-energy styles. Fans can expect decisive action as the tournament nears its conclusion.

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