Ultraman Taro: S1 E12 - Monster's Solo Journey
Hayashida is digging up a hot spring at a plateau, but gets in a big argument with the development's president. He could not find a hot spring no matter how far he dug, so he was branded a fraud. Hayashida became determined to dig up a hot spring not only for himself, but also for his son. However, the next area that he dug turned out to be the back of the onster Vorkeller!