Question: Who is the founder of the company which  in a joint venture with Blackstorm Labs built the RGames HTML5 gaming platform?
Sentence (from "Rakuten"): Rakuten, Inc. (楽天株式会社 , Rakuten Kabushiki-gaisha ) is a Japanese electronic commerce and Internet company based in Tokyo and founded in 1997 by Hiroshi Mikitani.
Relevant evidence: Yes