NTT Docomo, a Japan-based mobile operator, has bought 20% of Baidu Yi Xin Network Technology, its joint venture with China-based search provider Baidu.
The companies started the joint venture in January last year, to provider digital content for mobile phones in mainland China.
Starting in August, Baidu Yi Xin plans to provide content from Japan on its platform. The company is collaborating with DeNA, a Japanese provider of social games, e-commerce and other Web services.