Honda Motor Co. will sell a hybrid version of the Accord in Japan that has the highest fuel-economy rating among midsize sedans to close the gap with Toyota Motor Corp.'s Camry.

The car will initially go on sale June 21 and has a fuel-efficiency rating of 30 km per liter under the JC08 testing standards, Honda said in a statement Friday.

The Camry hybrid travels 23.4 km a liter, according to Toyota, while Nissan Motor Co. says its Teana, which runs on gasoline, gets 11.4 km per liter.