E.N.T Effects

E.N.T Effects is a guitar effects pedal brand whose units, such as the "Shin-Yatsu Over Drive" and "Shin-Hit Overdrive," have appeared on the used/vintage market via Japanese music retailers (e.g., Ishibashi Music in Tokyo). The brand appears to be a small or boutique Japanese maker with limited international web presence; no official homepage or detailed company history could be verified from publicly available sources.