Sawada vs. Nikolakakos Set for Vacant Atomweight Title

Chihiro Sawada will face undefeated Anastasia Nikolakakos for the vacant ONE Women's Atomweight MMA World Championship at ONE SAMURAI 6 on Wednesday, December 2, at Yokohama Buntai in Yokohama, Japan.

The matchup is the first confirmed bout for the card, and it carries real stakes beyond the vacant belt. Sawada, a 28-year-old former Shooto Atomweight Champion, is bidding to become the first Japanese woman to win a ONE World Title. Nikolakakos, a 36-year-old Brazilian Jiu-Jitsu black belt out of Toronto, is still unbeaten and looking to prove her win over Jihin Radzuan was no fluke.

Why This Title Fight Makes Sense Now

Sawada enters off a four-fight winning streak that erased the only blemish on her record. She opened her ONE run with wins over Sanaz Fayazmanesh, Jihin Radzuan, and Noelle Grandjean before a loss in January 2025. Since then she has reeled off first-round armbar finishes of Macarena Aragon and Ayaka Miura, a unanimous decision over Itsuki Hirata, and a win over previously unbeaten Natalie Salcedo, pushing her record to 12-1. Five of her 12 wins have come by submission, and her wrestling is considered among the best in the atomweight division.

Nikolakakos has done her resume-building in two fights. She finished Victoria Souza in her ONE debut at 4:59 of the first round, then outworked Jihin Radzuan by split decision at ONE Fight Night 45 in July to move to 7-0. That win was enough to convince both the Toronto representative and ONE Championship that she belonged in a title fight next.

What the Style Matchup Looks Like

Both women want the fight on the ground, which should make the scramble for top position the deciding factor across five scheduled rounds. Sawada will look to use her wrestling to put Nikolakakos on her back and control from top position, where her submission rate suggests real finishing instincts. Nikolakakos, a BJJ black belt, is comfortable working off her back or from top control and has shown heavy hands to go with her grappling pedigree. Whoever controls the clinch and the first takedown attempt is likely to dictate how the rest of the fight plays out.

Betting Angle

No title fight odds have opened publicly yet, but expect this to shape up as a close line given the stylistic overlap and the fact that both fighters are unbeaten or nearly so in ONE competition. Sawada's four-fight finishing run and home-crowd advantage in Yokohama could make her a short favorite once markets open, but Nikolakakos's unblemished 7-0 record and grappling credentials give her a legitimate path to an upset. Bettors watching the line move should pay attention to how oddsmakers weigh Sawada's recent string of finishes against Nikolakakos's unbeaten record and stronger pure jiu-jitsu pedigree.

Frequently Asked Questions

When is Chihiro Sawada vs. Anastasia Nikolakakos for the vacant ONE atomweight title?

The title fight takes place Wednesday, December 2, at ONE SAMURAI 6 in Yokohama Buntai, Yokohama, Japan.

What are the records of Chihiro Sawada and Anastasia Nikolakakos heading into ONE SAMURAI 6?

Chihiro Sawada is 12-1 with a four-fight winning streak, while Anastasia Nikolakakos is undefeated at 7-0 heading into the vacant atomweight title fight.

What title is on the line at ONE SAMURAI 6?

Chihiro Sawada and Anastasia Nikolakakos are fighting for the vacant ONE Women's Atomweight MMA World Championship.