Where is Pokémon: The First Movie set?

1998 anime film directed by Kunihiko Yuyama

Pokémon: The First Movie (1998) is not pinned on this map. Wikidata records no setting for this anime. What is below is the weaker claim its Japanese Wikipedia article makes: the real places its setting was modelled on. Where the anime takes place, not where it was made: an anime is drawn and filmed nowhere, so this is the only kind of location it has.

Part of the Pokémon film series

Open the map → Wikipedia Source data

Drawn from these real places

Japanese Wikipedia says this anime’s setting was modelled on these real places. Nothing was filmed at them.