Phyllonorycter watanabei is a moth of the family Gracillariidae.

It is known from the islands of Hokkaido, Shikoku, Honshu and Kyushu in Japan and from the Russian Far East.

[1] The larvae feed as leaf miners on Pourthiaea villosa and Pyrus ussuriensis.

[1] The mine is ptychonomous and located in the space between two veins of the lower surface of the leaf.

This article relating to moths in genus Phyllonorycter is a stub.