mathru, also known as Kanimiso-P (かにみそP), is a producer who is the author of Gackpo's hit song "Dancing Samurai", and has received the title of "Legendary Gackpo Master" on Niconico. He is known for creating songs that are catchy and produce a brainwashing effect. "Kanimiso", his producer name, comes from a Miku song he made. He even creates ballads with nice melodies and simple lyrics. mathru is also known for the terrible artwork that appears in some of his videos. Read more on Last.fm