Ultraman: S1 E21 - Breach The Wall Of Smoke Ultraman

Receiving a warning that a wild birds and animals massively died in Mt. Otake and a woman who went hiking witnessed something like a monster at the summit, Fuji headed to the scene along with Hoshino. However, sulfite gas had been produced and the monster Kemular emerged during the investigation. Based on the advice of Hoshino, Ide rushes to develop new weapons for repelling Kemular!