Tsumiki (ツミキ), born on August 11, 1997, is a Japanese music producer and singer-songwriter. He has used the VOCALOID voicebanks Hatsune Miku, GUMI, Kagamine Rin, IA and the CeVIO KAFU. His music is known for its fast tempo and addictive sound and is mainly written in Katakana characters. His most well-known track is フォニイ (phony), which has over 50 million views on YouTube.