noun
Izu Province; Izu
Historical province name; now used in modern place names such as Izu Peninsula and Izu Islands.
伊豆はかつての令制国の一つで、現在の静岡県東部と伊豆諸島にあたる。
Izu was one of the old provinces of Japan, corresponding to present-day eastern Shizuoka Prefecture and the Izu Islands.
The name 伊豆 is of ancient origin, used as a province name since the Nara period. The exact derivation is uncertain.