Gaming giant Sega Networks also invested in Gumi through the round, which will see the business attempt to expand across the US ahead of an anticipated IPO later this year.
Gumi had previously raised about $45m from backers including Jafco Ventures, East Ventures and DBJ Capital.
The company’s smartphone-focused games include Yakuza Wars and fantasy-themes Dragon Genesis.
Last summer Japanese private equity firm Oak Capital reportedly invested $6.6m in mobile game designer KLab.
The Tokyo-listed company, which was formed in 2000, develops social games including Lord of The Dragons and Flyshot Golf.
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