Kazuhito Kosaka (Japanese: 古坂和仁, Hepburn: Kosaka Kazuhito, born 17 July 1973), better known by his stage names Daimaou Kosaka (古坂大魔王, Kosaka Daimaō, lit: "Kosaka the Great Demon King") and Pikotaro (ピコ太郎, Pikotarō), is a Japanese comedian, television personality and entertainer. Kosaka insists that Pikotaro is another personality promoted by him, but they are considered the same person. He is currently signed with Avex Management Inc. under Avex Group.

He is best known for his single "PPAP (Pen-Pineapple-Apple-Pen)".

During US President Donald Trump's Fall 2017 trip to Asia, Kosaka was chosen to sing at the official state reception, reportedly due to Japanese Prime Minister Shinzō Abe's wish to keep the mood "upbeat".

Kosaka is also known for portraying Muryou Hakataminami in Mashin Sentai Kiramager (2020–2021).