Nissan Motor Co.’s sales fell 19 % due to a delay in launching new models.
Honda Motor Co. suffered a 10.1 % fall as the effects of model changes waned.
Minivehicle sales surged 22.4 % to 125,812 units.
Sales of larger vehicles grew 4.6 % to 217,064 units.
The sales increase was partly attributable to a recovery in production at a factory of parts supplier Chuo Spring Co. in Aichi Prefecture following an explosion in March, an official at the Japan Automobile Dealers Association said.