Across the world, Watase (Watase 
, יו 
) is a very rare dominantly boy's, but uncommonly girly given name. The forename Watase is habitual in South Africa, where it is a very rare epicene name, and China, where it is an extremely rare masculine name. More prevalently, Watase is the last name as well as the forename.
Watase is also a popular name for the fictitious and mythical characters: Bulldog Drummond , the fictional character created by H. C. McNeile (pen name "Sapper"), Bulldog Drummond; Hugh Culber , the fictional character from Star Trek, Star Trek: Discovery; Hugh Fitzcairn , the fictional character, Highlander: The Series; Hugh , the fictional character, I, Borg and Yū Sonoda , the fictional character from Sakura Trick, and in many other works.