Mixi, the Japan-based social networking site and Facebook rival, is following other Japanese media and telecommunications companies into the corporate venturing market. Following two start-up investments in recent weeks, Mixi now plans to set up its own venturing unit later this year.

Japan social network company Mixi (TYO ticker: 2121) in recent weeks has named a new chief executive officer and backed two Japan-based start-ups with plans to set up an investment arm as a subsidiary in July.

Mixi co-founder Kenji Kasahara will be stepping down with Yusuke Asakura to take over his place effective 25 June, when the company’s next shareholder meeting is scheduled.The recent Mixi investments are a sign that the social network business is following in the footsteps of…