Jiro Kase (?? ??, Kase Jiro, born 27 December 1954) is a retired Japanese judoka.
Kase is from Sumida, Tokyo and began judo at Kodokan at the age of a 4th grader.
He belonged to Keiyo Gas Co.,Ltd after graduation from Meiji University in 1977.In 1981, he won a silver medal at the World Championships held in Maastricht.
He also participated All-Japan Championships 5 times from 1977 to 1985.As of 2010, Kase coaches judo at Keiyo Gas.