The talented 20 year old Iriguchi had fought his last few bouts, including a Japanese Youth title bout in December, at Super Bantamweight and hadn't actually fought at Bantamweight since a December 2016 win.
On the scales Iriguchi was originally 500g, just over 1lbs, over the Bantamweight limit. After 45 minutes he was still over the Bantamweight limit and his gym, the Kadoebi gym, cancelled the bout on the grounds of health, with the promotional team behind the show agreeing it was the right thing to do.
Sadly for the Kadoebi gym this is the second notable time one of their fighters has failed to make weight in recent weeks, with Coach Hiroto (13-2-2, 4) [小内義人] failing to make weight for a bout back in March.
As a result of this bout being cancelled Nakagawa, who was supposed to be defending the title, will be fighting in an exhibition with his older brother Mugicha Nakagawa (22-5-1, 13) [武田勇太], who is expected to return fight in mid May in the Philippines.