Japanese world titleholder Naoya Inoue has resumed intense training in readiness to defend his undisputed super-bantamweight belt against Ramon Cardenas on 4 May at T-Mobile Arena in Las Vegas.

“Liven up Japanese boxing [and fight me] at the Tokyo Dome one year from now, ” Inoue said to Nakatani. “Let’s do it,” replied Nakatani. Now, as we all know, Japanese boxing, buzzing as ...