[4] In 2008, Yuyoyuppe began to post videos on the video sharing service Nico Nico Douga,[4] where he would become well known for his Vocaloid songs with elements of hard rock,[6] with considerable success for his song "Hope", sung by Hatsune Miku.
[2] On January 16, 2013, he released the album Wall in the Presence: Yuppemism Edition to the iTunes Store.
[9] On July 7, 2014, he released the album Vocaloholic,[10] and later that month, he left My Eggplant Died Yesterday to form a new band called Grilled Meat Youngmans.
[14][15][16] He is married to voice actress Hibiku Yamamura, who announced their marriage on Twitter on November 3rd, 2023.
[18] Mamiya has expressed that although he has solid scheduling and deadlines, he follows his instincts while working, which loosens his fixation on them.