Hitoki Iwase (?? ??, born November 10, 1974) is a retired Japanese professional baseball player from Nishio, Aichi, Japan.
He holds the NPB record for career saves and mound appearances.In 2005, he marked 46 saves with a 1.88 ERA, renewing the single-season save record previously set by Kazuhiro Sasaki.
This was subsequently broken by Dennis Sarfate of the Fukuoka Softbank Hawks in 2017.
He was chosen to play on the Japanese Olympic baseball team for the 2004 Summer Olympics, and won a bronze medal.
In the 2007 Japan Series, he saved a perfect game with eight innings thrown by Daisuke Yamai.