花魁淵, Waterfall in Koshu, Japan
Oiran-buchi is a waterfall in mountainous Koshu, Yamanashi Prefecture, tumbling between steep rock walls. Dense woodland surrounds the spot where water drops over several natural ledges into a narrow basin.
The spot gained its name in the 16th century, when an incident involving gold mine workers occurred under the rule of the Takeda clan. Later generations linked the place to legends from the Sengoku period.
The waterfall name refers to courtesans from the warrior era, whose story remains part of local memory. Visitors can read explanatory panels along the path that recount the old narrative.
The site sits along National Route 411 with designated parking spaces and a concrete viewing platform nearby. Sturdy footwear is recommended for the short walk to the waterfall.
Remains of the Kurokawa gold mine lie a few hundred meters from the waterfall. The mine was especially active during Takeda times and supplied raw materials for the clan.
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