Surname Сэйдзи (Seiji 
, Maehara 
, Сэйдзи 
) , globally, is quite a common family name. The cognomen Сэйдзи is habitual in Japan, where it is quite a rare surname, Taiwan, where it is a rare surname, and Singapore. Not in comparison with a country's population, the name is most common in Japan, China, and Brazil. Also, Сэйдзи is the forename as well as the last name.