Toshihiko Sakai 堺利彦
（重定向自Sakai Toshihiko）
4002.jpg)
Toshihiko Sakai(堺 利彦Sakai Toshihiko, November 25, 1871 - January 23, 1933) was a Japanese socialist, writer, historian. He is also known by the pen name Saka Kosen(堺枯川). He is also known for his translation with Shūsui Kōtoku.