Amefuri-kozo

In Japanese folklore, a spirit in the form of a little boy with an umbrella on his head, causing rain.

Amefuri kozō ( あめふりここ - Japanese spelling of the name Amefuri-kozo syllabic alphabet kana, 雨降小僧 - the original Japanese spelling of the name)  — literally "rain novice".

According to beliefs, he can be caught playing when he splashes in puddles on rainy evenings. Outwardly, he looks like a child, wears a hat made of a broken old umbrella on his head, and holds a paper flashlight in his hands.

In the descriptions Toriyama Sekien (from "Konjaku-gadzu-zoku-hyakki") amefuri-kozo is in the service of the Chinese god of precipitation Yu-shi, so he can control the rain.