As tourists visit Japan in increasing numbers, mobile phone operators are moving to tap the market by providing better Wi-Fi services.

NTT Docomo Inc., the largest domestic operator, and Wire and Wireless Co., a part of the KDDI Corp. group, have both rolled out trial Wi-Fi services for foreign tourists using their vast Wi-Fi infrastructure.

The lack of convenient Wi-Fi connections is often one of the major complaints of foreign visitors, and the two firms are taking separate approaches to win more of their business.