Last name Keiji (吉川 
, Keiji 
, Кэидзи 
) , across the world, is quite a rare family name. The family name Keiji is characteristic of Japan, where it is quite a rare surname, Hong Kong, where it is a rare surname, and Singapore. Measured by absolute frequency, it is commonest in Japan, China, and Indonesia. Also, Keiji is the forename as well as the last name.