The Yamanashi at-large district (Japanese: 山梨県選挙区, Hepburn: Yamanashi-ken senkyoku) is a constituency that represents Yamanashi Prefecture in the House of Councillors in the Diet of Japan.

Hiroshi Moriya（Liberal Democratic） Class of 2022: The constituency represents the entire population of Yamanashi Prefecture.

The district elects two Councillors to six-year terms, one at alternating elections held every three years.

The district has 692,001 registered voters as of September 2015.

[2] The Councillors currently representing Yamanashi are: