The Shinsei gym fighter first made a name for himself in 2014, when he claimed the Rookie of the Year crown.
Konishi claimed the national title in April 2017, when he narrowly beat Masataka Taniguchi with a majority decision but seemed to struggle to get his body down to the weight in a comfortable fashion. Despite battles with the scales he would defend the title twice, over-coming Shin Ono in September and Kenta Matsui in December. It was following the win over Matsuithat Konoishi stated his plans, but it wasn't until today that he finally relinquished the belt.
At the moment it's unclear on which champion he is aiming for, but he is ranked by all 4 world title bodies. He is ranked #8 by the IBF, #6 by the WBC and #5 by the WBO, all at Minimumweight, and #2 by the WBA at Light Flyweight. The WBA ranking, and the WBA's recent announcement in regards to making Ryoichi Taguchi (27-2-2, 12) [田口良一] their "Unified champion", have left a possible vacant title bout between Konishi and the #1 ranked Carlos Canizales (19-0-1, 16).
(Image courtesy of boxmob.jp)