First, a run-down of the particulars:
- A limit of 108 pounds is observed for this list.
- The inception of the title was the first fight in the division between the two undefeated Atomweight fighters.
- Recordkeeping and regulations (weight classes) were notoriously bad for Women’s MMA. As a result, we may update this list if new info presents itself.
Your current lineal Atomweight champion is Seika Izawa
The full history is below. Note, the colored backgrounds indicate a title change.
MMA Women’s Atomweight Lineal Championship History
| Date | Champion | Outcome | Challenger | Notes |
| 2002-04-07 | Satoko Shinashi | WIN | Aiko Koike | Inception |
| 2002-07-07 | Satoko Shinashi | DRAW | Kinuyo Yoshizumi | No division info available for this bout. |
| 2003-07-06 | Satoko Shinashi | WIN | Misaki Takimoto | |
| 2004-01-22 | Satoko Shinashi | WIN | Naoko Omuro | |
| 2004-02-08 | Satoko Shinashi | WIN | Kayo Nagayasu | No division info available for this bout. |
| 2004-03-20 | Satoko Shinashi | WIN | Yuki Furutachi | No division info available for this bout. |
| 2004-06-06 | Satoko Shinashi | WIN | Nana Ichikawa | No division info available for this bout. |
| 2004-07-03 | Satoko Shinashi | WIN | Su Jeong Sim | |
| 2004-10-30 | Satoko Shinashi | WIN | Supannipa Chutipanyo | |
| 2005-02-12 | Satoko Shinashi | DRAW | Mari Kaneko | |
| 2005-05-04 | Satoko Shinashi | WIN | Pamela Vitz | |
| 2005-07-08 | Satoko Shinashi | WIN | Mari Kaneko | |
| 2005-09-03 | Satoko Shinashi | WIN | Noriko Okamoto | |
| 2005-11-29 | Satoko Shinashi | WIN | Naoko Omuro | |
| 2006-04-11 | Satoko Shinashi | WIN | Shiho Yamato | |
| 2006-08-04 | Hisae Watanabe | WIN | Satoko Shinashi | |
| 2007-02-16 | Seo Hee Ham | WIN | Hisae Watanabe | Hee Ham’s debut! |
| 2007-05-13 | Miku Matsumoto | WIN | Seo Hee Ham | |
| 2007-06-16 | Miku Matsumoto | WIN | Misaki Takimoto | |
| 2007-08-05 | Miku Matsumoto | WIN | Hisae Watanabe | |
| 2007-10-28 | Miku Matsumoto | WIN | Masako Yoshida | No division info available for this bout. |
| 2007-12-09 | Miku Matsumoto | WIN | Yukiko Seki | No division info available for this bout. |
| 2008-08-17 | Miku Matsumoto | WIN | Misaki Takimoto | Matsumoto abandons the division. |
| 2010-06-19 | Yasuko Tamada | WIN | Naoko Omuro | Vacant title. Top contender fight. |
| 2010-11-28 | Naho Sugiyama | WIN | Yasuko Tamada | |
| 2011-05-14 | Naho Sugiyama | WIN | Misaki Takimoto | |
| 2011-09-11 | Naho Sugiyama | WIN | Ayumi Saito | |
| 2011-12-17 | Naho Sugiyama | WIN | Kikuyo Ishikawa | |
| 2011-12-17 | Naho Sugiyama | WIN | Misaki Takimoto | |
| 2012-05-26 | Naho Sugiyama | WIN | Yasuko Tamada | |
| 2012-10-06 | Jessica Penne | WIN | Naho Sugiyama | |
| 2013-04-05 | Michelle Waterson | WIN | Jessica Penne | |
| 2014-09-06 | Michelle Waterson | WIN | Yasuko Tamada | |
| 2014-12-05 | Herica Tiburcio | WIN | Michelle Waterson | |
| 2015-07-09 | Ayaka Hamasaki | WIN | Herica Tiburcio | |
| 2016-03-11 | Ayaka Hamasaki | WIN | Amber Brown | |
| 2016-09-23 | Ayaka Hamasaki | WIN | Jinh Yu Frey | |
| 2018-05-06 | Ayaka Hamasaki | WIN | Alyssa Garcia | |
| 2018-09-30 | Ayaka Hamasaki | WIN | Mina Kurobe | |
| 2018-12-31 | Ayaka Hamasaki | WIN | Kanna Asakura | |
| 2019-06-02 | Ayaka Hamasaki | WIN | Jinh Yu Frey | |
| 2019-08-18 | Ayaka Hamasaki | WIN | Suwanan Boonsorn | |
| 2019-12-31 | Seo Hee Ham | WIN | Ayaka Hamasaki | Hee Ham abandons the division. |
| 2022-04-17 | Seika Izawa | WIN | Ayaka Hamasaki | Vacant title. Top contender fight. |
| 2022-07-31 | Seika Izawa | WIN | Maria Laura Alves Fontoura | |
| 2022-09-25 | Seika Izawa | WIN | Anastasiya Svetkivska | |
| 2022-12-31 | Seika Izawa | WIN | Si Woo Park | |
| 2023-05-28 | Seika Izawa | WIN | Suwanan Boonsorn | |
| 2023-07-30 | Seika Izawa | WIN | Claire Lopez | |
| 2022-12-31 | Seika Izawa | WIN | Miyuu Yamamoto | |
| 2023-05-28 | Seika Izawa | WIN | See Yoon Park | |
| 2023-07-30 | Seika Izawa | WIN | Kanna Asakura |