Napster Japan says it will launch an over-the-air (OTA) music subscription service through a joint venture with Tower Records Japan. The service is being launched in cooperation with NTT DoCoMo, Japan's biggest mobile carrier, which is Tower Records Japan's biggest shareholder.

It will be the first deployment of Napster's OTA music subscription service, and will provide DoCoMo's customers with wireless access to Napster listening and downloading services, according to an announcement from Napster. It will also be fully integrated with Napster's PC-based subscription service.

The Napster OTA service will be available to DoCoMo's iMode subscribers via the soon-to-be-released 904i series of handsets. DoCoMo's customers will have access to OTA subscription functionality as an extension of the Napster To Go service at no additional cost.

"Launching our music subscription product on a wireless platform is a landmark for Napster and we are honored to be delivering this cutting edge innovation with DoCoMo, one of the world's largest and most innovative wireless carriers," said Napster chairman/CEO Chris Gorog in a statement.