# List of Deep champions

This is a list of Deep champions at each weight class. Deep is a Japan-based mixed martial arts (MMA) promoting and sanctioning organization.

## Current champions
### Men

| Division | Champion | Since | Defenses |
| Megatonweight | Roque Martinez | July 15, 2017 | 3 |
| Light Heavyweight | Vacant | March 9, 2019 | — |
| Middleweight | João Batista Yoshimura | July 4, 2021 | 0 |
| Welterweight | Yoichiro Sato | July 14, 2024 | 0 |
| Lightweight | Shunta Nomura | September 16, 2024 | 0 |
| Featherweight | Jin Aoi | March 9, 2024 | 0 |
| Bantamweight | Ryuya Fukuda | September 16, 2024 | 0 |
| Flyweight | Ryuya Fukuda | March 29, 2024 | 0 |
| Strawweight | Haruo Ochi | May 26, 2024 | 0 |

### Women

| Division | Champion | Since | Defenses |
| Openweight | Amanda Lucas | February 18, 2012 | 0 |
| Atomweight | Vacant | March 9, 2019 | — |
| Microweight | Saori Oshima | September 20, 2020 | 1 |

## Men's championship history
### Megatonweight Championship

       Weight limit: Unlimited
| No. | Name | Event | Date | Reign (total) | Defenses |
| 1 | Yusuke Kawaguchi def. Shunsuke Inoue | Deep: Megaton Grand Prix 2008 Finals Tokyo, Japan | August 2, 2008 | 870 days | 1. def Baru Harn at Deep 38 Impact on October 23, 2008 2. def. Seigo Mizuguchi at Deep: 44 Impact on October 10, 2009 3. def. Roque Martinez at Deep: Cage Impact 2009 on December 19, 2009 |
| Kawaguchi vacated the title on December 20, 2010. ||||||
| 2 | Kazuhisa Tazawa def. Yuji Sakuragi | Deep 52 Impact Tokyo, Japan | February 25, 2011 | 182 days | |
| 3 | Levan Razmadze | Deep 55 Impact Tokyo, Japan | August 26, 2011 | 327 days | 1. def. Ryuta Noji at Deep 57 Impact on February 18, 2012 |
| Razmadze vacated the title in July 4, 2012. ||||||
| 4 | Ken Hasegawa def. Seigo Mizuguchi | Deep 61 Impact Tokyo, Japan | February 16, 2013 | 970 days | 1. def. Hirohide Fujinuma at Deep 63 Impact on August 25, 2013 2. def. Kazuhiro Nakamura at Deep 65 Impact on March 22, 2014 |
| Hasegawa vacated the title on October 14, 2015 when he started competing at a lower weight class. ||||||
| 5 | Jaideep Singh def. Carlos Toyota | Deep 73 Impact Tokyo, Japan | October 17, 2015 | 637 days | |
| 6 | Roque Martinez | Deep Cage Impact 2017: At Korakuen Hall Tokyo, Japan | July 15, 2017 | 2,729 days (incumbent) | 1. def. Ryo Sakai at Deep 88 Impact on March 9, 2019 2. def. Seigo Mizuguchi at Deep 93 Impact on December 15, 2019 3. def. interim champion Ryo Sakai at Deep 118 Impact on March 9, 2024 |
| — | Ryo Sakai def. Yukinori Akazawa for interim title | Deep 110 Impact Tokyo, Japan | November 12, 2022 | 483 days | 1. def Tatsuya Mizuno at Deep 114 Impact on July 2, 2023. |

### Light Heavyweight Championship

       Weight limit: 93 kg (205 lb)
| No. | Name | Event | Date | Reign (total) | Defenses |
| 1 | Yoshiyuki Nakanishi def. Ryuta Noji | Deep 47 Impact Tokyo, Japan | April 17, 2010 | 3,248 days | 1. def. Bernard Ackah at Deep 54 Impact on June 24, 2011 2. def. Yuki Niimura at Deep 60 Impact on October 19, 2012 3. def. Shunsuke Inoue at Deep 66 Impact on April 29, 2014 |
| Nakanishi vacated the title on March 9, 2019 when he retired. ||||||

### Middleweight Championship

       Weight limit: 84 kg (185.2 lb)
| No. | Name | Event | Date | Reign (total) | Defenses |
| 1 | Ryuki Ueyama def. Eiji Ishikawa | Deep 5 Impact Tokyo, Japan | June 9, 2002 | 914 days | 1. drew with Masanori Suda at Deep 12 Impact on September 15, 2003 |
| 2 | Ryuta Sakurai | Deep 17 Impact Tokyo, Japan | December 8, 2004 | 425 days | |
| 3 | Ryo Chonan | Deep 23 Impact Tokyo, Japan | February 5, 2006 | 676 days | 1. def. Ryuta Sakurai at Deep 28 Impact on February 16, 2007 |
| Chonan vacated the title on December 12, 2007. ||||||
| 4 | Yuichi Nakanishi def. Riki Fukuda | Deep 35 Impact Tokyo, Japan | May 19, 2008 | 408 days | |
| 5 | Riki Fukuda | Deep: 42 Impact Tokyo, Japan | June 30, 2009 | 738 days | 1. def. Ryuta Sakurai at Deep 49 Impact on August 27, 2010 |
| Fukuda vacated the title in July 8, 2011 due to being signed with the UFC. ||||||
| 6 | Kazuhiro Nakamura def. Choi Young | Deep 61 Impact Tokyo, Japan | February 16, 2013 | 673 days | |
| 7 | Yoshiyuki Nakanishi | Deep 70 Impact Tokyo, Japan | Decision 20, 2014 | 296 days | |
| 8 | Choi Young | Deep Cage Impact 2015 in Osaka Osaka, Japan | October 11, 2015 | ? days | |
| Choi vacated the title in 2016 when he signed with Road FC. ||||||
| 9 | Tatsuya Mizuno def. Taisuke Okuno | Deep 82 Impact Tokyo, Japan | February 24, 2018 | 1,227 days | |
| 10 | João-Batista Yoshimura | Deep 102 Impact Tokyo, Japan | July 4, 2021 | 1,279 days (incumbent) | |

### Welterweight Championship

       Weight limit: 77 kg (169.7 lb)
| No. | Name | Event | Date | Reign (total) | Defenses |
| 1 | Jutaro Nakao def. Daisuke Nakamura | Deep 16 Impact Tokyo, Japan | October 30, 2004 | 840 days | 1. def. Seichi Ikemoto at RealRhythm 3rd Stage on March 4, 2006 |
| 2 | Hidehiko Hasegawa | Deep 28 Impact Tokyo, Japan | February 16, 2007 | 528 days | 1. drew with Dong Hyun Kim at Deep 32 Impact on October 10, 2007 |
| 3 | Seichi Ikemoto | Deep 36 Impact Osaka, Japan | July 27, 2008 | 547 days | 1. def. Hidetaka Monma at Deep: 40 Impact on February 20, 2009 |
| 4 | Yuya Shirai | Deep 45 Impact Osaka, Japan | January 24, 2010 | 1,189 days | 1. def. Shigetoshi Iwase at Deep 50 Impact on October 24, 2010 2. def. Taisuke Okuno at Deep 56 Impact on December 16, 2011 |
| 5 | Dan Hornbuckle | Deep 62 Impact Tokyo, Japan | April 26, 2013 | 178 days | |
| 6 | Ryo Chonan | Deep - Tribe Tokyo Night Tokyo, Japan | October 20, 2013 | >1 day | |
| Chonan won the title in his retirement fight and retired as champion. ||||||
| 7 | Yuta Watanabe def. Taisuke Okuno | Deep 66 Impact Tokyo, Japan | April 29, 2014 | 438 days | 1. def. Yuya Shirai at Deep 70 Impact on December 20, 2014 |
| 8 | Keita Nakamura | Deep - Cage Impact 2015 Tokyo, Japan | July 20, 2015 | ? days | |
| Title vacant when Nakamura signed with the UFC. ||||||
| 9 | Ryuichiro Sumimura def. Ken Hasegawa | Deep - Cage Impact 2017: at Korakuen Hall Tokyo, Japan | July 15, 2017 | 1775 days | 1. def. Yoichiro Sato at Deep 83 Impact on April 28, 2018 2. def. Yuta Watanabe at Deep 94 Impact on March 1, 2020 |
| — | Daichi Abe def. Gota Yamashita for interim title | Deep - 100 Impact - 20th Anniversary Bunkyo, Tokyo, Japan | February 21, 2021 | 458 days | |
| Sumimura vacated the title in May 25, 2022 following an injury. ||||||
| 10 | Daichi Abe promoted to undisputed champion | — | May 25, 2022 | 262 days | |
| 11 | Shingo Suzuki | Deep 112 Impact Tokyo, Japan | February 11, 2023 | 519 days | |
| 12 | Yoichiro Sato | Deep 120 Impact Tokyo, Japan | July 14, 2024 | 173 days (incumbent) | |

### Lightweight Championship

       Weight limit: 70 kg (154.3 lb)
| No. | Name | Event | Date | Reign (total) | Defenses |
| 1 | Dokonjonosuke Mishima def. Tomomi "Taisho" Iwama | Deep 18 Impact Tokyo, Japan | February 12, 2005 | ? days | |
| Mishima vacated the title in February 2006, as he was unable to defend in the mandatory time period. ||||||
| 2 | Nobuhiro Obiya def. Ryan Bow | Deep 24 Impact Tokyo, Japan | April 11, 2006 | 312 days | |
| 3 | Kazunori Yokota | Deep 28 Impact Tokyo, Japan | February 16, 2007 | 459 days | |
| 4 | Bang Seung-hwan | Deep 35 Impact Tokyo, Japan | May 19, 2008 | ? days | |
| Bang vacated the title in October 2008. ||||||
| 5 | Katsunori Kikuno def. Koichiro Matsumoto | Deep: 41 Impact Tokyo, Japan | April 16, 2009 | 863 days | 1. def. Nobuhiro Obiya at Deep 50 Impact on October 24, 2010 |
| 6 | Mizuto Hirota | Deep 55 Impact Tokyo, Japan | August 26, 2011 | ? days | 1. def. Seichi Ikemoto at Deep 57 Impact on February 18, 2012 |
| Hirota vacated the title in April 2012. ||||||
| 7 | Daisuke Nakamura def. Yasuaki Kishimoto | Deep 58 Impact Tokyo, Japan | June 15, 2012 | 326 days | 1. def. Takafumi Ito at Deep 60 Impact on October 19, 2012 |
| 8 | Satoru Kitaoka | Deep 62 Impact Tokyo, Japan | April 26, 2013 | 2,011 days | 1. def. Naoto Miyazaki at Deep 66 Impact on April 29, 2014 2. def. Yoshiyuki Yoshida at Deep Dream Impact: Omisoka Special on December 31, 2014 3. def. Yuki Okano at Deep Cage Impact 2015 on Jul 20, 2015 4. def. Kota Shimoishi at Deep 76 Impact on June 26, 2016 |
| 9 | Koji Takeda | Deep 86 Impact Tokyo, Japan | October 27, 2018 | 1,235 days | 1. def. Juri Ohara at Deep 82 Impact on October 22, 2019 2. def. Juri Ohara at Deep 93 Impact on December 15, 2019 |
| — | Juri Ohara def. Ryota Oki for interim title | Deep 102 Impact Tokyo, Japan | July 4, 2021 | 227 days | |
| Takeda vacated the belt on March 15, 2022. ||||||
| 10 | Juri Ohara promoted to undisputed champion | — | March 15, 2022 | 552 days | 1. def. Yuma Ishizuka at Deep 108 Impact on Jul 10, 2022 2. def. Hiroto Uesako at Deep 113 Impact on May 7, 2023 |
| 11 | Lee Song-ha | Deep 115 Impact: Deep Vs. Black Combat 2 Tokyo, Japan | September 18, 2023 | 173 days | |
| 12 | Kimihiro Eto | Deep 118 Impact Tokyo, Japan | March 9, 2024 | 191 days | |
| 13 | Shunta Nomura | Deep 121 Impact Tokyo, Japan | September 16, 2024 | 109 days (incumbent) | |

### Featherweight Championship

       Weight limit: 65 kg (143.3 lb)
| No. | Name | Event | Date | Reign (total) | Defenses |
| 1 | Masakazu Imanari def. Yoshiro Maeda | Deep 22 Impact Tokyo, Japan | December 2, 2005 | 900 days | 1. def. Tsuyoshi Yamazaki at Deep 26 Impact on Oct 10, 2006 |
| 2 | Dokonjonosuke Mishima | Deep 35 Impact Tokyo, Japan | May 19, 2008 | 462 days | |
| 3 | Takafumi Otsuka | Deep: 43 Impact Tokyo, Japan | August 23, 2009 | 315 days | |
| 4 | Koichiro Matsumoto | Deep 48 Impact Tokyo, Japan | July 3, 2010 | 420 days | 1. def. Tatsunao Nagakura at Deep 55 Impact on Aug 26, 2011 |
| Matsumoto retired on August 26, 2011, thereby vacating the title. ||||||
| 5 | Kazunori Yokota def. Hideki Kadowaki | Deep 57 Impact Tokyo, Japan | February 18, 2012 | ? days | 1. def. Katsunori Tsuda at Deep 66 Impact on Apr 29, 2014 |
| Yokota vacated the title in May 2016 when he left to compete for ONE Championship. ||||||
| 6 | Masakazu Imanari (2) def. Tatsunao Nagakura | Deep Cage Impact 2016: Deep vs. WSOF-GC Tokyo, Japan | December 17, 2016 | ? days | |
| Imanari vacated the title for unknown reasons. ||||||
| 7 | Hiroto Uesako def. Koichi Ishizuka | Deep Cage Impact 2017: At Korakuen Hall Tokyo, Japan | July 15, 2017 | 162 days | |
| 8 | Takahiro Ashida | Deep 81 Impact Tokyo, Japan | December 23, 2017 | 309 days | |
| 9 | Satoshi Yamasu | Deep 86 Impact Tokyo, Japan | October 27, 2018 | 695 days | 1. def. Daiki Hata at Deep 89 Impact on May 12, 2019 |
| 10 | Juntaro Ushiku | Deep 97 Impact Tokyo, Japan | September 20, 2020 | 1189 days | 1. def. Daisuke Nakamura at Deep 102 Impact on July 4, 2021 2. def. Kouya Kanda at Deep 105 Impact on December 12, 2021 |
| — | Kouya Kanda def. Hiroto Gomyo for interim title | Deep 112 Impact Tokyo, Japan | February 11, 2023 | 313 days | |
| Ushiku vacated the title on December 21, 2023, when he started competing at a lower weight class. ||||||
| 11 | Kouya Kanda promoted to undisputed champion | — | December 21, 2023 | 79 days | |
| 12 | Jin Aoi | Deep 118 Impact Tokyo, Japan | March 9, 2024 | 300 days (incumbent) | |

### Bantamweight Championship

       Weight limit: 60 kg (132.3 lb)
| No. | Name | Event | Date | Reign (total) | Defenses |
| 1 | Masakazu Imanari def. Hiroshi Umemura | Deep 37 Impact Tokyo, Japan | August 17, 2008 | 1,018 days | 1. def. Tomohiko Hori at Deep: 43 Impact on August 23, 2009 2. def. Tomoya Miyashita at Deep 49 Impact on August 27, 2010 |
| Imanari vacated the title on May 31, 2011. ||||||
| 2 | Takafumi Otsuka def. Hiroshi Nakamura | Deep 54 Impact Tokyo, Japan | June 24, 2011 | 240 days | |
| 3 | Yoshiro Maeda | Deep 57 Impact Tokyo, Japan | February 18, 2012 | 434 days | 1. def. Tatsumitsu Wada at Deep 59 Impact on August 18, 2012 |
| 4 | Daiki Hata | Deep 62 Impact Tokyo, Japan | April 26, 2013 | ? days | |
| Hata vacated the title. ||||||
| 5 | Takafumi Otsuka (2) def. Kenji Osawa | Deep 66 Impact Tokyo, Japan | April 29, 2014 | ? days | 1. def. Toshinori Tsunemura at Deep 69 Impact on October 26, 2014 2. def. Toshiaki Kitada at Deep 72 Impact on May 16, 2015 3. def. Koichi Ishizuka at Deep Cage Impact 2017 on May 13, 2017 |
| Otsuka vacated the title for unknown reasons. ||||||
| 6 | Son Jin-soo def. Toshiaki Kitada | Deep 83 Impact Tokyo, Japan | April 28, 2018 | ? days | |
| Son vacated the title in 2018 when he signed with UFC. ||||||
| 7 | Yuki Motoya def. Makoto Kamaya | Deep 86 Impact Tokyo, Japan | October 27, 2018 | 134 days | |
| 8 | Victor Henry | Deep 88 Impact Tokyo, Japan | March 9, 2019 | 1,619 days | |
| — | Kosuke Terashima def. Daiki Hata for interim title | Deep 107 Impact Tokyo, Japan | May 8, 2022 | 215 days |
| — | Koichi Ishizuka def. Kosuke Terashima for interim title | Deep 110 Impact Tokyo, Japan | November 12, 2022 | 276 days | |
| Henry vacated the title on August 15, 2023 due to being unable to defend his title while signed with UFC. ||||||
| 9 | Koichi Ishizuka promoted to undisputed champion | — | August 15, 2023 | 34 days | |
| 10 | Yoo Soo-young | Deep 115 Impact: Deep Vs. Black Combat 2 Tokyo, Japan | September 18, 2023 | 194 days | |
| Yoo vacated the title on March 30, 2024. ||||||
| 11 | Ryuya Fukuda def. Kenta Takizawa | Deep 121 Impact Tokyo, Japan | September 16, 2024 | 109 days (incumbent) | |

### Flyweight Championship

       Weight limit: 56 kg (123.4 lb)
| No. | Name | Event | Date | Reign (total) | Defenses |
| 1 | Yuki Motoya def. Akira Kibe | Deep Nagoya Impact Nagoya, Aichi, Japan | July 22, 2012 | 400 days | |
| 2 | Tatsumitsu Wada | Deep 63 Impact Tokyo, Japan | August 25, 2013 | 364 days | |
| 3 | Yuki Motoya (2) | Deep 68 Impact Tokyo, Japan | August 23, 2014 | ? days | 1. def. Kojima Sota at Deep 73 Impact on October 17, 2015 |
| Motoya vacated the title in April 2016. ||||||
| 4 | Tatsumitsu Wada (2) def. Yuya Shibata | Deep 76 Impact Tokyo, Japan | June 26, 2016 | 1,342 days | 1. def. Makoto Takahashi at Deep 83 Impact on April 28, 2018 |
| — | Makoto Takahashi def. Yuya Shibata for interim title | Deep 90 Impact Tokyo, Japan | June 29, 2019 | 246 days | |
| Wada vacated the title on February 28, 2020. ||||||
| 5 | Makoto Takahashi promoted to undisputed champion. | — | February 28, 2020 | 1,490 days | 1. def. Yamato Fujita in unification bout at Deep 107 Impact on May 8, 2022 |
| — | Yamato Fujita def. Kazuki Shibuya for interim title | Deep 100 Impact - 20th Anniversary Tokyo, Japan | February 21, 2021 | 441 days | 1. def. Yuki Ito at Deep 103 Impact on September 23, 2021 |
| — | Ryuya Fukuda def. Ryosuke Honda for interim title | Deep 113 Impact Tokyo, Japan | May 7, 2023 | 327 days | |
| Takahashi vacated the title on March 29, 2024 to focus on competing in RIZIN. ||||||
| 6 | Ryuya Fukuda promoted to undisputed champion. | — | March 29, 2024 | 280 days (incumbent) | |

### Strawweight Championship

       Weight limit: 52 kg (114.6 lb)
| No. | Name | Event | Date | Reign (total) | Defenses |
| 1 | Kanta Sato def. Kojima Sota | Deep Cage Impact 2016: Korakuen Hall Tokyo, Japan | October 18, 2016 | 334 days | |
| 2 | Haruo Ochi | Deep 79 Impact Tokyo, Japan | September 16, 2017 | 1,073 days | 1. def. Yuya Shibata at Deep Cage Impact in Osaka 2018 on April 8, 2018 2. def. Namiki Kawahara at Deep 88 Impact on March 9, 2019 |
| 3 | Namiki Kawahara | Deep 96 Impact Tokyo, Japan | August 23, 2020 | 1,372 days | |
| — | Haruo Ochi def. Yusuke Uehara for interim title | Deep 117 Impact Tokyo, Japan | December 10, 2023 | 168 days | |
| 4 | Haruo Ochi (2) | DEEP Tokyo Impact 2024 3rd Round Tokyo, Japan | May 26, 2024 | 222 days (incumbent) | |

## Women's championship history
### Women's Openweight Championship

| No. | Name | Event | Date | Reign (total) | Defenses |
| 1 | Amanda Lucas def. Yumiko Hotta | Deep 57 Impact Tokyo, Japan | February 18, 2012 | 3,918 days | |

### Women's Atomweight Championship

       Weight limit: 48 kg (105.8 lb)
| No. | Name | Event | Date | Reign (total) | Defenses |
| 1 | Hisae Watanabe def. Satoko Shinashi | Deep 25 Impact Tokyo, Japan | August 4, 2006 | 367 days | |
| 2 | Miku Matsumoto | Deep 31 Impact Tokyo, Japan | August 5, 2007 | 987 days | 1. def. Misaki Takimoto at Deep 37 Impact on August 17, 2008 2. def. Lisa Ward at Deep TOYAMA Impact on June 28, 2009 |
| Matsumoto vacated the title on April 17, 2010, following her retirement from the sport. ||||||

### Women's Microweight Championship

       Weight limit: 45 kg (99.2 lb)
| No. | Name | Event | Date | Reign (total) | Defenses |
| 1 | Satoko Shinashi def. Sachiko Yamamoto | Deep 34 Impact Tokyo, Japan | February 22, 2008 | 3,962 days | |
| Shinashi vacated the title in 2018. ||||||
| 2 | Saori Oshima def. Mizuki Oshiro | Deep 97 Impact Tokyo, Japan | September 20, 2020 | 1,566 days (incumbent) | 1. def. Mizuki Furuse at Deep 110 Impact on November 12, 2022 2. def. Aya Murakami at Deep Jewels 45 on May 26, 2024 |

## Footnotes

* ↑ While the title hasn't been active since 2012 and Lucas isn't competing anymore, Deep never announced the vacancy of the title.
* ↑ While the title hasn't been active since 2018, Deep never announced the vacancy of the title.