Originally Gungho was a company running online games, but grows up by a mobile social game recently. Particularly, "Puzzle & Dragons" and "Keri-Hime Sweets" were popular, and the sales of their February exceeded 10 billion yen.
SOFTBANK Mobile says that the profitability and competitiveness improvement of the mobile business is urgent business. If this offer is completed, Gungho becomes the member of the SOFTBANK group.
By the way, Softbank CEO Masayoshi Son and Gungho chairperson Taizo Son are brothers.
Softbank's Press Release is here(English).