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	Taisei Sekino	August 17, 2025	0
Light Heavyweight	Vacant	March 9, 2019	—
Middleweight	João Batista Yoshimura	July 4, 2021	0
Welterweight	Kohei Kadono	May 5, 2025	0
Lightweight	Shunta Nomura	September 16, 2024	0
Featherweight	Jin Aoi	March 9, 2024	0
Bantamweight	Ryuya Fukuda	September 16, 2024	1
Flyweight	Yutaro Muramoto	August 17, 2025	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.[1]
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.[2]
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	2,887 days	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	–	1. def Tatsuya Mizuno at Deep 114 Impact on July 2, 2023.
Martinez vacated the title on June 10, 2025 after he retired.[3]
7	Taisei Sekino def. Ryo Sakai	Deep 126 Impact Tokyo, Japan	August 17, 2025	17 days (incumbent)

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.[4]

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.[5]
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]
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.[7]
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	1,522 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.[8]
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	—
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	295 days
13	Kohei Kadono	Deep 125 Impact Tokyo, Japan	May 5, 2025	121 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.[9]
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.[10]
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[citation needed]
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	—
Takeda vacated the belt on March 15, 2022.[11]
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	352 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.[12]
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.[13]
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	—
Ushiku vacated the title on December 21, 2023, when he started competing at a lower weight class.[14]
11	Kouya Kanda promoted to undisputed champion	—	December 21, 2023	79 days
12	Jin Aoi	Deep 118 Impact Tokyo, Japan	March 9, 2024	543 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	—
—	Koichi Ishizuka def. Kosuke Terashima for interim title	Deep 110 Impact Tokyo, Japan	November 12, 2022	—
Henry vacated the title on August 15, 2023 due to being unable to defend his title while signed with UFC.[15]
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.[16]
11	Ryuya Fukuda def. Kenta Takizawa	Deep 121 Impact Tokyo, Japan	September 16, 2024	352 days (incumbent)	1. def. Juntaro Ushiku at Deep 125 Impact on May 5, 2025

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.[17]
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	—
Wada vacated the title on February 28, 2020.[18]
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	—	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	—
Takahashi vacated the title on March 29, 2024 to focus on competing in RIZIN.[19]
6	Ryuya Fukuda promoted to undisputed champion.	—	March 29, 2024	438 days
Fukuda vacated the title on June 10, 2025.
7	Yutaro Muramoto def. Kenta Hayashi	Deep 126 Impact Tokyo, Japan	August 17, 2025	17 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	—
4	Haruo Ochi (2)	DEEP Tokyo Impact 2024 3rd Round Tokyo, Japan	May 26, 2024	465 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[Note 1]

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.[20]

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	1,809 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

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

See also

• List of current mixed martial arts champions
• List of Deep events
• List of Jewels events
• List of Jewels champions
• List of Pancrase champions
• List of Pride champions
• List of Road FC champions
• List of Strikeforce champions
• List of UFC champions
• List of WEC champions
• Mixed martial arts weight classes