| 1 | A | B | C | D | E |
| --- | --- | --- | --- | --- | --- |
| 2 | List of Deep champions - Featherweight |  |  |  |  |
| 3 | No. | Name | Event | Date | Defenses |
| 4 | 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 |
| 5 | 2 | Japan Dokonjonosuke Mishima | DEEP 35 Impact Tokyo, Japan | May 19, 2008 | - |
| 6 | 3 | Japan Takafumi Otsuka | Deep: 43 Impact Tokyo, Japan | August 23, 2009 | - |
| 7 | 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 |
| 8 | 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. |
| 9 | 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 |
| 10 | 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. |
| 11 | 6 | Japan Masakazu Imanari (2) def. Tatsunao Nagakura | DEEP Cage Impact 2016: DEEP vs. WSOF-GC Tokyo, Japan | December 17, 2016 | - |
| 12 | 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. |
| 13 | 7 | Japan Hiroto Uesako def. Koichi Ishizuka | DEEP Cage Impact 2017: At Korakuen Hall Tokyo, Japan | July 15, 2017 | - |
| 14 | 8 | Japan Takahiro Ashida | DEEP 81 Impact Tokyo, Japan | December 23, 2017 | - |
| 15 | 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.