Japan is raising the bar for subsidizing zero-emission cars as incentives may exceed ?3 million a vehicle for Toyota Motor Corp.¡¯s first hydrogen-powered sedan.

Rebates from the central and prefectural governments may top a combined ?3 million per car.

Prime Minister Shinzo Abe said last week he plans to extend subsidies of at least ?2 million, while Aichi Prefecture, Toyota¡¯s home turf, may provide about ?1 million for local purchases, according to Takashi Horibe, the area¡¯s auto and environmental conservation specialist.