Pierrot Co., Ltd. is a Japanese animation studio established in May 1979 by Yuji Nunokawa, previously an animator and director for Tatsunoko Production. Its headquarters are located in Mitaka, Tokyo. Pierrot is renowned for several worldwide popular anime series, such as Naruto, Bleach, Tokyo Ghoul, Yu Yu Hakusho, Black Clover, Boruto: Naruto Next Generations, Ghost Stories, Great Teacher Onizuka, and Saiyuki.

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.