List of Deep champions
Featherweight

No.
Name
Event
Date
Defenses
1
Japan Masakazu Imanari def. Yoshiro Maeda
DEEP 22 Impact Tokyo, Japan
December 2, 2005
1. def. Tsuyoshi Yamazaki at DEEP 26 Impact on Oct 10, 2006 in Tokyo, Japan
2
Japan Dokonjonosuke Mishima
DEEP 35 Impact Tokyo, Japan
May 19, 2008
-
3
Japan Takafumi Otsuka
Deep: 43 Impact Tokyo, Japan
August 23, 2009
-
4
Japan Koichiro Matsumoto
DEEP 48 Impact Tokyo, Japan
July 3, 2010
1. def. Tatsunao Nagakura at DEEP 55 Impact on Aug 26, 2011 in Tokyo, Japan
Koichiro Matsumoto retired on August 26, 2011, thereby vacating the title.
Koichiro Matsumoto retired on August 26, 2011, thereby vacating the title.
Koichiro Matsumoto retired on August 26, 2011, thereby vacating the title.
Koichiro Matsumoto retired on August 26, 2011, thereby vacating the title.
Koichiro Matsumoto retired on August 26, 2011, thereby vacating the title.
5
Japan Kazunori Yokota def. Hideki Kadowaki
DEEP 57 Impact Tokyo, Japan
February 18, 2012
1. def. Katusnori Tsuda at DEEP 66 Impact on Apr 29, 2014 in Tokyo, Japan
Kazunori Yokota vacated the title in May 2016 when he left to compete for ONE Championship.
Kazunori Yokota vacated the title in May 2016 when he left to compete for ONE Championship.
Kazunori Yokota vacated the title in May 2016 when he left to compete for ONE Championship.
Kazunori Yokota vacated the title in May 2016 when he left to compete for ONE Championship.
Kazunori Yokota vacated the title in May 2016 when he left to compete for ONE Championship.
6
Japan Masakazu Imanari (2) def. Tatsunao Nagakura
DEEP Cage Impact 2016: DEEP vs. WSOF-GC Tokyo, Japan
December 17, 2016
-
Imanari vacated the title for unknown reasons.
Imanari vacated the title for unknown reasons.
Imanari vacated the title for unknown reasons.
Imanari vacated the title for unknown reasons.
Imanari vacated the title for unknown reasons.
7
Japan Hiroto Uesako def. Koichi Ishizuka
DEEP Cage Impact 2017: At Korakuen Hall Tokyo, Japan
July 15, 2017
-
8
Japan Takahiro Ashida
DEEP 81 Impact Tokyo, Japan
December 23, 2017
-
9
Japan Satoshi Yamasu
DEEP 86 Impact Tokyo, Japan
October 27, 2018
-

Question: What honor did Masakazu Imanari achieve twice by defeating Tatsunao Nagakura and Yoshiro Maeda?
Answer: Masakazu Imanari was a two-time DEEP featherweight champion.