KimurawaiP (木村わいP), also known as Kimura Kyoudai (木村兄弟), shelfall, or simply kimura, is a producer, illustrator and guitarist. He started out as a parody maker and guitarist, posting his works on Niconico under the name shelfall, some of which VOCALOID-related contents. Eventually, he set up a second Niconico channel, KimurawaiP, focusing on creating VOCALOID works.
He mainly uses Hatsune Miku in his songs, and is best known for various hilarious songs with cartoonish hand-drawn PVs featuring her. His most notable song is Kouon Chuu On'iki Test.