Son Gokuu is a monkey who was born from a stone and is endowed with magical powers. He gets carried away and goes on a rampage until at last Buddha confines him within Mt. Gogyo. Saved by Sanzo Houshi, Son Gokuu accompanies him on a journey to India. But on their way, monsters lie in wait for them.

Source: BakaBT

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Other: Gokuu no Daibouken
Alternative version: Saiyuuki
Alternative setting: Tezuka Osamu Monogatari: Boku wa Son Gokuu
Other: Tezuka Osamu ga Kieta?! 20 Seiki Saigo no Kaijiken