Surname 本治 (Baj 
, 本治 
) , in all the world, is a common cognomen. The surname 本治 is habitual in Martinique, where it is quite a common surname, Poland, where it is quite a rare surname, and Saudi Arabia. In absolute terms, it most frequently occurs in India, Poland, and Italy. Also, 本治 is the forename as well as the last name.