Ryoichi Taguchi has four losses against four opponents on his boxing record. For a list of Taguchi's best fights, refer to "Best fights of Ryoichi Taguchi".
On March 16, 2019 Ryoichi Taguchi fought Kosei Tanaka in a flyweight world-title fight for Tanaka's WBO title. Taguchi was 32 years old and with a record of 27-4-2 (12), and Tanaka was 23 years old and with a record of 12-0 (7). Taguchi lost the fight via 12-round unanimous decision.
On May 20, 2018 Ryoichi Taguchi met Hekkie Budler in a light-flyweight (WBA (Unified), IBF, The Ring) world-title defense fight. Taguchi was 31 years old and with a record of 27-3-2 (12), and Budler was 30 years old and with a record of 31-3 (10). Taguchi lost the fight via 12-round unanimous decision and lost the titles.
On August 25, 2013 Ryoichi Taguchi faced off against Naoya Inoue in a light-flyweight bout at age 26. He was coming in with a record of 18-2-1 (8), and Inoue was 20 years old and with a record of 3-0 (3). Taguchi lost the fight via 10-round unanimous decision.
On August 1, 2009 Ryoichi Taguchi faced off against Masayoshi Segawa at age 22. He was coming in with a record of 9-1 (3). Taguchi lost the fight via 8-round unanimous decision.
