Kase (written: 加瀬) is a Japanese surname. Notable people with the surname include:
Hideaki Kase (born 1936), Japanese diplomatic criticJiro Kase (born 1954), Japanese judokaKanako Kase, Japanese professional racing cyclistMax Kase (1897–1974), American newspaper editorRyō Kase (born 1974), Japanese actorShun'ichi Kase (1897–1956), Japanese diplomatTaiji Kase (1929–2004), Japanese karate masterToshikazu Kase (1903–2004), Japanese diplomatYasuyuki Kase (born 1971), Japanese voice actor