After living abroad in New York for 5 years he started working in the translation business and writing English lyrics. He currently works with Hiroyuki Sawano on his soundtracks writing lyrics and even singing.

mpi chooses not to disclose information about himself for various reasons, but finally performed for the first time live at Hiroyuki Sawano's [nZk]003 live performance on September 12, 2015.

Other songs mpi has performed in:

- "Missing Piece" from TV Drama Marumo no Okite

- "Song of .." and "The Best for You" from NHK TV Drama Mare

- "Black tar," "Uncontrollable," "In the forest" and "In the forest <X→Z ver.>" from video game XenobladeX