マツタケワークス (Matsutake Works) was formed in 2014 by エイジ (Eiji) and タッケン (Takken), both previously in 秘密結社コドモＡ (Himitsu Kessha Codomo A), キボウ屋本舗 (Kibouya Honpo) and サンドイッチで１２０分？ (Sandoicchi de 120 pun?). Eventually, ミズグチトモヒロ (Mizuguchi Tomohiro), also from キボウ屋本舗 (Kibouya Honpo), joined the band on drums. At this point the band mainly performed music from the various bands エイジ (Eiji) had been active in throughout the years