| Nishizawasan-P (西沢さんP) also known as TOKOTOKO is a VOCAROCK producer, who majorly uses GUMI, but he has also used Hatsune Miku, SF-A2 miki, Kagamine Rin and MAYU.
Several songs of him entered the VOCALOID Hall of Fame (gaining 100,000 views), with his most popular song up to date being "Koushi no Shinzou", with over 250,000 views.
His songs can be identified by a characteristic stingy guitar sound; he plays the guitar himself and is known for being good at guitar cutting.
Aside from being able to play he guitar, he can also play bass, as he has been in a band before.
His -P name came from the video description of "Kataomoi PUMPKIN☆MAGIC", an original of him, which is now deleted. It mentioned his affection to Nishizawa Ayumu, thus giving him his -P name.
Aside from doing VOCALOID songs, he also does vocal covers.