Surname Shintarō (Shintaro 
, Shintarō 
) , all around the world, is a rare last name. The last name Shintarō is characteristic of Singapore, where it is a rare surname, Indonesia, and Japan, where it is a very rare surname. Not in comparison with a country's population, it most frequently occurs in Indonesia, China, and Japan. Also, Shintarō is the forename as well as the last name.