This song can be used commercially as long as it abides by the following:
1. feat. Keita Roimo or feat. Kei Sugano is included in the song title.
2. Except in the case that it is used in the Club, the song itself is not directly used. ( you need to add song or rap on it)
As long as the conditions above is satisfied, you do not need to ask permission to Keita Roimo for using this song.
credits
released July 1, 2017
Japanese, Born in Kashiwa city, Japan, as son of a presbyterian pastor. Currently project suganology is aiming at creating varieties of music, manga, et cetra. Studied at Waseda University and Oregon State University.