Yozakura Quartet is a Japanese manga series written and illustrated by Suzuhito Yasuda. It has been serialized in Kodansha's shōnen manga magazine Monthly Shōnen Sirius since January 2006, with its chapters collected in 30 tankōbon volumes as of December 2022. In North America, the manga was first licensed by Del Rey Manga, and later by Kodansha USA for a digital-only release.

Tatsunoko Production Co., Ltd. and often shortened to Tatsunoko Pro , is a Japanese animation company. The studio's name has a double meaning in Japanese: "Tatsu's child" and "sea dragon", the inspiration for its seahorse logo.