Hiroki, the cousin of Naoya and Takuma, will debut in December 29th in a junior welterweight bout, if he passes his test bout on November 19th. He's trained by Shingo, just like the brothers and was another successful amateur.
Source
http://www.asianboxing.info/asian-news/another-inoue-set-to-turn-pro-debut-penciled-in-for-december-29th