Tokyo introduction

Oenothera was blooming beautifully.

It is pronounced "Matsuyoi gusa". Another name for it is "Tsukimi sou".
"Tsukimi sou" is written in Chinese characters as "月見草" meaning viewing the moon.
It is a beautiful name.

On this day, too, the yellow flowers were beautiful against the blue sky.

Wikipedia
https://en.wikipedia.org/wiki/Oenothera