Hiroshi Shirai (?? ?, Shirai Hiroshi, born July 31, 1937) is a Japanese master of Shotokan karate.
He is the founder of the Istituto Shotokan Italia, a subdivision of FIKTA (the Italian Traditional Karate Association) and of the SCI (Shotokan Cultural Institute, formerly WSI - World Shotokan Institute).
Shirai holds the title of Shihan and is responsible for taking the dan examinations within SCI and, together with Carlo Fugazza, for those within the FIKTA.