TOKYO -- Japanese e-commerce group Rakuten will delay the start of full mobile service until spring as it works to become the country's fourth wireless carrier, Nikkei has learned.
Bid to disrupt market hampered by slow progress on infrastructure

Rakuten's entry into the wireless market has been closely watched for its potential to inject fresh competition into a field dominated by three carriers. (Photo by Keiichiro Sato)
TOKYO -- Japanese e-commerce group Rakuten will delay the start of full mobile service until spring as it works to become the country's fourth wireless carrier, Nikkei has learned.