Middleweight: 171-185 lbs.

Ryuki Ueyama and Eiji Ishikawa compete for the inaugural Deep middleweight championship.
1	Ryuki Ueyama	def.	Eiji Ishikawa	Submission (toe hold) @ 0:48 of R2	Deep: 5th Impact	06.09.02
		drw.	Masanori Suda	Draw (time expired) @ 5:00 of R3	Deep: 12th Impact	09.15.03
2	Ryuta Sakurai	def.	Ryuki Ueyama	TKO (punches) @ 2:40 of R1	Deep: 17th Impact	12.18.04
3	Ryo Chonan	def.	Ryuta Sakurai	TKO (doctor stoppage) @ 1:57 of R1	Deep: 23 Impact	02.05.06
		def.	Ryuta Sakurai	Decision (majority) @ 5:00 of R3	Deep: 28 Impact	02.16.07
Ryo Chonan vacates the Deep middleweight championship after leaving the promotion to compete for the Ultimate Fighting Championship. Yuichi Nakanishi and Riki Fukuda compete for the vacant Deep middleweight championship.
4	Yuichi Nakanishi	def.	Riki Fukuda	Decision (unanimous) @ 5:00 of R3	Deep: 35 Impact	05.19.08
5	Riki Fukuda	def.	Yuichi Nakanishi	Decision (unanimous) @ 5:00 of R3	Deep: 42 Impact	06.30.09
		def.	Ryuta Sakurai	TKO (knees) @ 0:32 of R2	Deep: 49 Impact	08.27.10
Riki Fukuda vacates the Deep middleweight championship after leaving the promotion to compete for the Ultimate Fighting Championship. Kazuhiro Nakamura and Young Choi compete for the vacant Deep middleweight championship.
6	Kazuhiro Nakamura	def.	Young Choi	Decision (unanimous) @ 5:00 of R3	Deep: 61 Impact	02.16.13
7	Yoshiyuki Nakanishi	def.	Kazuhiro Nakamura	Decision (unanimous) @ 5:00 of R3	Deep: 70 Impact	12.21.14
8	Young Choi	def.	Yoshiyuki Nakanishi	Decision (majority) @ 5:00 of R3	Deep: Cage Impact 2015	10.11.15
Young Choi vacates the Deep middleweight championship after leaving the promotion to compete for Road Fighting Championship. Tatsuya Mizuno and Taisuke Okuno compete for the vacant Deep middleweight championship.
9	Tatsuya Mizuno	def.	Taisuke Okuno	Submission (rear-naked choke) @ 4:34 of R3	Deep: 82 Impact	02.24.18