Ishimoto is best known for claiming the WBO International title back in 2013 when he over-came former world champion Wilfredo Vazquez Jr in a huge upset in Macau. That is, to date, his signature win.
Sadly Ishimoto is also known for coming up short in his other notable bouts, including a stoppage loss in a world title eliminator against Chris Avalos, also fought in Macau, and a very close loss in a Japanese title fight last year to Yukinori Oguni.
Those losses came in back-to-back fights for Ishimoto though he's certainly got nothing to be ashamed of and will be confident ahead of his ring return.
When the story first broke to us there was no opponent named for Ishimoto, though boxrec.com now have Ishimoto's opponent listed as the little known Yoshihiro Utsumi (12-5-3, 7). Utsumi, at least on paper, is no serious threat to Ishimoto, though has won his last couple of bouts with back-to-back opening round KO's and does seem to have decent power, at least at the lower levels.
(Image courtesy of boxrec.com)