Tōkai–Tōsan dialects
The Tōkai–Tōsan dialect is a group of the transitional Japanese dialects spoken in the southern and eastern Chūbu region. The dialects spoken in the northwest Chubu region are classified as the Hokuriku dialect of Western Japanese. The Tokai–Tosan dialect has three sub-groups: Gifu–Aichi, Echigo, and Nagano–Yamanashi–Shizuoka. These are transitional between Western and Eastern Japanese; which branch of the family they fall in depends on which isoglosses are taken as definitive.
Nagano–Yamanashi–Shizuoka
The Nagano–Yamanashi–Shizuoka a.k.a. Na-Ya-Shi dialects are spoken in Nagano Prefecture, Yamanashi Prefecture and Shizuoka Prefecture. It is characterized by a presumptive suffix -zura or -ra.- Nagano a.k.a. Shinshū dialect
- * Okushinano dialect
- * Hokushin dialect
- * Tōshin dialect
- * Chūshin dialect
- * Nanshin dialect
- Shizuoka dialect
- * Izu dialect
- * Enshū dialect
- Kōshū a.k.a. Yamanashi dialect
Echigo
The Echigo dialect is spoken in mainly Niigata Prefecture, formerly known as Echigo Province except north of the Agano River.- Niigata dialect
- Nagaoka dialect
- Jōetsu dialect
- Uonuma dialect
Gifu–Aichi
The Gifu–Aichi a.k.a. Gi–A dialects are spoken in Gifu Prefecture and Aichi Prefecture. They share many grammar features with Western Japanese.- Mino dialect
- Hida dialect
- Owari dialect
- * Chita dialect
- * Nagoya dialect
- Mikawa dialect
- * West Mikawa
- * East Mikawa
Language islands
Mountain village dialects that retain fragments of Eastern Old Japanese.- Akiyamago dialect
- Narada dialect
- Ikawa dialect
In popular culture
- At the beginning of the movie Your Name the teacher teaches students differences between the standard Japanese language and the Tōkai-Tōsan dialect.