Edit: I also think there's a fear of this: wide acceptance of EVs open the door to BYD (or similar) huge takeover of the car market.
https://opengov.jp/en/economy/energy/crude-oil-imports/
Japan (Panasonic) is important baterry cell manufacturer, but most battery cells are exported, not used for domestic EVs. For example Panasonic is supplying batteries for Tesla.
https://en.wikipedia.org/wiki/List_of_electric_vehicle_batte...
Edit: I also think there's a fear of this: wide acceptance of EVs open the door to BYD (or similar) huge takeover of the car market.