Yama-Warawa or more commonly known as Yama-Waro (山童 Yama-Warawa, lit. Mountain child) in the series is a yōkai.
He appears in the fourth movie based on the third anime adaptation, GeGeGe no Kitarō: Gekitotsu!! Ijigen Yōkai no Dai-Hanran!!. He and Kasha were knocked out by Yumeko Tendō and Neko-Musume with golf clubs.
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Yamawaro is a type of kappa widely distributed among middle to western Japan. Yamawaro's original kanji was 山𤢖, and it was from Chinese mythology.