Surname コシバ (コシバ 
, Koshiba 
) , in the entire world, is a rare cognomen. The cognomen コシバ is habitual in Belgium, where it is a rare surname, Japan, where it is a very rare surname, and Brazil. Not in comparison with a country's population, this name is the most popular in Japan, Brazil, and the United States. More frequently, コシバ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| コシバ | Japan |
| Koshiba | Brazil, Japan, Belgium, United States, Indonesia |