Atomweight (MMA)

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title: "Atomweight (MMA)" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["mixed-martial-arts-weight-classes", "women's-mixed-martial-arts"] description: "MMA weight class" topic_path: "general/mixed-martial-arts-weight-classes" source: "https://en.wikipedia.org/wiki/Atomweight_(MMA)" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary MMA weight class ::

The atomweight division in mixed martial arts generally refers to competitors weighing less than 48 kg, depending on the promotion. It sits below the heavier strawweight division and is the lightest weight class widely recognized within MMA. The atomweight division in mixed martial arts is used almost exclusively for Women's MMA.

Ambiguity

In general, atomweight refers to competitors weighing less than 48 kg, but the exact weight differs per promotion. Fight Matrix classifies fighters at 110.9 lbs (50.3 kg) and under as atomweight.

• The Deep Jewels atomweight division has an upper limit of 47.6 kg (105 lbs). It was previously known as featherweight until May 2015.
• The Invicta Fighting Championships atomweight division is between 95 and 105 lbs (43 to 47.6 kg).
• The Pancrase atomweight division has an upper limit of 47.6 kg.
• The ONE Championship atomweight division is between 105 and 115 lbs (47.6 to 52.2 kg).
• The Road Fighting Championship atomweight division has an upper limit of 48 kg.
• The Shooto atomweight division has an upper limit of 47.6 kg.

History

::figure[src="https://upload.wikimedia.org/wikipedia/commons/5/5b/Seo_Hee_Ham_vs.Mina_Kurobe(Road_FC_039)_-_2000_x_1125.jpg" caption="[[Mina Kurobe]] vs. [[Seo Hee Ham]] for the inaugural [[Road FC Women's Atomweight Championship]], 2017"] ::

Deep Jewels regularly holds contests at 47.6 kg and circulates a championship title. A tournament took place that culminated on December 17, 2011 at Jewels 17th Ring, where Naho Sugiyama defeated both Kikuyo Ishikawa and Misaki Takimoto on the same night to win the inaugural championship. Although now titled the atomweight class, the division was previously known as the featherweight class until May 2015.

Invicta held their inaugural atomweight title fight on October 6, 2012. The contest saw Jessica Penne defeating Naho Sugiyama by triangle choke in the second round.

ONE Championship held their inaugural atomweight championship title match on May 6, 2016. The fight saw Angela Lee defeat Mei Yamaguchi.

Road FC introduced an atomweight championship title on June 10, 2017. The match saw Seo Hee Ham defeat Mina Kurobe by TKO in the third round.

Shooto introduced an atomweight championship via a tournament that culminated on November 27, 2022, where Chihiro Sawada defeated Yuki Ono.

Pancrase held a tournament to crown their inaugural atomweight champion. It concluded on March 31, 2024, with Sarami stopping Sayako Fujita in the first round.

Professional champions

Current champions

::data[format=table]

Organization	Reign began	Champion	Record	Defenses
Deep Jewels	March 24, 2024	Japan Seika Izawa	18–0 (1KO 10SUB)	0
Rizin FF	April 17, 2022	Japan Seika Izawa	18–0 (1KO 10SUB)	3
Invicta FC	September 20, 2024	Brazil Elisandra Ferreira	8–2 (1KO)	1
ONE Championship	May 2, 2025	Philippines Denice Zamboanga	12–2 (3KO 3SUB)	0
Pancrase	March 31, 2024	JPN Sarami	19–14 (3KO 6SUB)	0
Road FC	September 4, 2021	South Korea Yu Ri Shim	6–3 (2KO 1SUB)	0
Shooto	August 3, 2024	JPN Aira Koga	7-3–1 (1KO, 1SUB)	0
::

References

References

1. "UFC Weight Classes Explained: Everything You Need to Know about them".
2. "Women's Atomweight".
3. (2015-06-02). "Deep Jewels Adopts Unified Weight Classes, Elbows Now Legal".
4. "Athletes".
5. "パンクラス オフィシャル ルール 〜 ２０１６年改訂版（２０１６年１月３１日より実施） 〜".
6. "Martial Arts".
7. "FIGHTERS 選手紹介: アトム級 [ -47.6 Kg ] / 10 選手".
8. (2011-12-17). "Jewels: "17th Ring" Live Play-By-Play & Results".
9. (2012-10-06). "Invicta FC 3 results and LIVE fight coverage for 'Penne vs Sugiyama' TONIGHT (Oct. 6)".
10. "ONE Championship Weight Classes: Everything You need to know".
11. (2017-06-14). "Video: UFC vet Seo Hee Ham drops a weight class, wins Road FC atomweight belt".
12. (2022-11-27). "【修斗】清水清隆が引退試合で秒殺TKO負け、藤井伸樹が石井逸人との大激闘を制し新王者に！".
13. (2024-03-31). "Honoka Shigeta, Satomi Takano Win Championships At Pancrase 341".
14. "Yu Ri Shim".

::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::