Sasago Tani

was a Japanese sprinter. He competed in the men's 100 metres and the 200 metres events at the 1924 Summer Olympics.

Tani was born in in the former Wake District (today Bizen City) of Okayama Prefecture. He graduated from Meiji University and worked for the Japanese Government Railways, among other jobs. By 1924 he had changed his surname to Tani. In November 1925, at the age of 31, he became the first Japanese sprinter to break the 11-second mark in the 100 metre dash. He died in 1956.