Kzuyuki Okudaira:

Bike-sharing via smartphone apps is on a roll in Japan, with flea market app Mercari, messaging app Line and Yahoo Japan having entered the market in the last six months.
 
 So why are online technology companies so keen on bike-sharing?
 
 Analysis suggests that it is a prelude to a “payment war” like the one that took place in China, where bike-sharing was used as a marketing tool by internet companies to boost online payment services.
 
 Mercari launched a bike-sharing service on Feb. 27, choosing Fukuoka in southern Japan as its pilot city. It set up 22 “ports,” or bases, where customers rent and return bikes.
 
 Currently, 120 bikes are available, with the company planning to increase ports to 50 and bikes to 400 by the end of March. By the end of summer, the company hopes to have a fleet of 2,000 bikes.