Kimono is the general name of the national costume of Kazuo nationality (the most important nationality in Japan), but even in Japan, it sometimes refers to the most famous complex kimono.

Bathrobe is also called single coat, so there is only one.

Fireworks Festival is also called Summer Festival, hence the name "Summer Festival".

It's out of season to wear that multi-piece kimono in early summer. It's also very hot.

Festivals are also stipulated in this way, and summer is greeted coolly in bathrobes.