Hide appears in several episodes, but does not speak.
In his first speaking role, we find that he speaks English poorly. He explains that he was a surgeon in Japan. One day while performing surgery on a Yakuza mob boss, the man died. As a result of this, he fled the country and went to America to start a new life. He credits Darryl for saving his life, and shares a secret with the documentary crew: He actually killed the boss of the Yakuza on purpose. ("Happy Hour")
Dwight recruits Hide to apply for the "Print in All Colors" executive training program, because he wants to undermine Kelly's application. Hide begins the interview by describing his former career as a surgeon, and obviously doesn't end up qualifying for the program.
After Sabre allows the warehouse workers to sell on the go,in the episode "The Seminar" (Season 7) we do get some numbers on his sales. Hide's sales were Nov.$8460 Dec.$7208 Jan.$2691 (higher than Andy's 3 months, burn).
Hide quit after he and the other warehouse workers won the lottery. ("Lotto") Darryl later mentions that he is using his money to invest in an energy drink for Asian homosexuals. Later, he and Glenn return after blowing all their money on investing in the energy drink. Darryl hires him back. ("Free Family Portrait Studio")