Daigo Umehara, aka "The Beast", is a pro-gamer. He's famous enough to get his picture on books he has little to do with!
Umehara's picture is on the book binding for the Japanese translation of tech thriller Daemon -- he didn't write it!
But, in Japan, photos of celebrities are often used on book covers in hopes of luring customers. Diago is internet famous and popular among gamers, but he's not yet famous like, say, Kayo Satoh, who is well known among non-gamers because of her television appearances and modelling.
In a recent interview, Umehara even autographed copies of Daemon, leading many Japanese netizens to note that his signature looks typed (ウメハラ) and that he really should practice his autograph so it has more flair!
Besides, if The Beast is going to promote something, let it be the t-shirt from our very own Mike McWhertor's Meat Bun.
本日開幕「GODSGARDEN #4」直前インタビュー。 [4Gamer]