- The Tosa has been assigned the Working Group designation.
- The Tosa has been recorded in the Foundation Stock Service since 1997.
- Other names for the breed include Tosa-Ken, Tosa Dog, Tosa-Token, Tosa-Inu, Japanese Fighting Dog and Japanese Mastiff.
- The breed is often pictured in full ceremonial regalia.
- The Tosa originated on the island of Shikoku.
- The Tosa is the largest of all Japanese breeds.
- During World War II, this extremely rare dog was very near extinction.


