The official Japanese Pokémon website has announced that they will be closing two Pokémon Stores on Sunday, May 9, 2021. No reason was officially given but the high cost of rental spaces in the Chubu airport and the lack of travelers over the last year due to the coronavirus may have had a significant impact on the store.

Notice of Closure:

Thank you for visiting the Pokémon Center and the Pokémon Store. We regret to inform you that we will close the above two stores on Sunday, May 9th, 2021. Thank you very much for your patronage over the years. Although there are only a few days left until the closure, we are all looking forward to seeing you at our stores. For any inquiries after May 10th, 2021 (Monday), please contact the Pokémon Customer Support Center.

We thank you for your continued support of the Pokémon Center and the Pokémon Store.

Source: https://voice.pokemon.co.jp/stv/zenten/2021/04/post-11020.html