Japan is home to the most publicly traded mobile gaming studios in the world: around 40-50 such companies exist in this country at the moment.
The vast majority of these developers got listed after GREE (3632) and DeNA (2432) pioneered the mobile social gaming wave around 2007.
Today, a new company went IPO in Japan, Tokyo-based Bank Of Innovation, with the ticker 4393.
The company reached a market cap of US$77 million, after the opening price of 960 yen ballooned to 2,199 yen at the end of the trading day.
As part of the IPO, Bank Of Innovation also disclosed that it expects sales of US$43 million and an operating profit of US$2.7 million when the current fiscal ends in September this year.
Bank Of Innovation mainly focuses on the Japanese market with its two top apps Mitrasphere and Genjuu Keiyaku Cryptract generating over 90% of all revenue (both are RPGs).
I would estimate that there are about ten mobile gaming companies that have the potential to get listed left in Japan.