During which historical period did the development of the Japanese Spitz into a distinct breed primarily take place?

Answer

The 1920s and 1930s

The actual development of the Japanese Spitz as a distinct breed took place primarily during the 1920s and 1930s.

During which historical period did the development of the Japanese Spitz into a distinct breed primarily take place?
Caninedog breedancestorspitzJapanese Spitz