Ochi would begin the fight with a left hook knockdown of his opponent, helped by Tozawa being off-balanced.
[7][8] Ochi would implement a pressuring game, and landed a left hook in the third round which staggered Nezu.
[16] Haruo Ochi's first bout with DEEP was in the co-main slot of the Tokyo Impact event, when he faced Chikara Shimabukuro.
During the first round of their matchup Imanari attempted several takedowns, with Ochi managing to defend them and dominate the striking exchanges.
The referee called for a stop in the action, and the ringside doctor ended the fight, as he suspected that Imanari suffered an orbital fracture.
[26] Ochi relied entirely on out-wrestling Ishibashi, who managed to land several good strikes in between conceding takedowns.
The judges ruled the fight a unanimous draw, as Ochi failed to land effective damage on Kota.
[27] In his last career fight at flyweight at that point, Ochi fought Sota Kojima at DEEP Cage Impact 2015 on July 20, 2015.
[33] Ochi implemented a pressuring game, using his strikes to set up takedowns, winning a unanimous decision and all three rounds of the bout.
In the third round, Ochi managed to knock his opponent down with hooks to the head and body, and followed up with a soccer kick, winning the fight by a third-round TKO.
During the striking exchange that followed, Namiki landed a knee to Ochi's midsection which forced Haruo to fight defensively for the remainder of the round.
In the second round Ochi once again shot for a double leg takedown, to which Kawahara responded by moving back to the fence.
[45][46] Ochi returned to mixed martial arts following a 13-month absence from the sport, in his first fight post-title loss, to face Kazuki Shibuya at DEEP 103 Impact on September 23, 2021.
[49] Ochi faced Sho Sekihara at DEEP 106 on February 26, 2022, in his third fight at flyweight since moving up in weight.
[50] He lost the fight by unanimous decision, with all three judges scoring the bout 29-28 in favor of Sekihara.
[53] Ochi faced Masato Nakamura at DEEP 111 Impact on December 11, 2022, winning the bout via first round guillotine choke.
[54] Ochi faced Woo Jae Kim at DEEP Tokyo Impact 2022 7th Round on May 27, 2023.