The Valley of Ryūkotsusei (竜骨精の谷, りゅうこつせいのこく, "Ryūkotsusei no koku") is where Ryūkotsusei resided until he was sealed by Tōga, after which he lay dormant until he was freed by Naraku and defeated by Tōga's youngest son, Inuyasha.
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The Valley of Ryūkotsusei (竜骨精の谷, りゅうこつせいのこく, "Ryūkotsusei no koku") is where Ryūkotsusei resided until he was sealed by Tōga, after which he lay dormant until he was freed by Naraku and defeated by Tōga's youngest son, Inuyasha.