Kafū Nagai (永井 荷風, Nagai Kafū; 3 December 1879 – 30 April 1959) was a Japanese writer, editor and translator. His novels Geisha in Rivalry and A Strange Tale from East of the River are noted for their depictions of life of the demimonde in early 20th-century Tokyo.
Source: “Kafū Nagai”, English Wikipedia (CC BY-SA 4.0), excerpt
