Tokyu Store at Tachikawa south exit (東急ストア立川南口店 — アレアレア) 東急ストア立川南口店 — アレアレア

It is where Ayaha buys the pancake mix. In the same block of 柴崎町3丁目 stands the ファミリーマート立川諏訪通り店 (3-1-7): the outside staircase of that building, the one leading to the beauty salon on the upper floors, is the setting of the kimono-dressing scene before the fireworks. The steps at the station's south exit also appear in the same sequence.

Supermarket inside the アレアレア centre, at 柴崎町3-6-29.

Tokyo

Tachikawa

Cosmic Princess Kaguya!

It is where Ayaha buys the pancake mix. In the same block of 柴崎町3丁目 stands the ファミリーマート立川諏訪通り店 (3-1-7): the outside staircase of that building, the one leading to the beauty salon on the upper floors, is the setting of the kimono-dressing scene before the fireworks. The steps at the station's south exit also appear in the same sequence.

All the places from Cosmic Princess Kaguya!

https://theanimetrip.com/luoghi/tokyu-store-alluscita-sud-di-tachikawa