Surname Boshu (博书 
, Boshu 
) , throughout the world, is quite a rare cognomen. The cognomen Boshu is habitual in Japan, where it is a rare surname, Bangladesh, and Ethiopia, where it is a very rare surname. Not in comparison with a country's population, the name is most common in Japan, Bangladesh, and China. Likewise, Boshu is the forename as well as the last name.