noun
Iwashiro Province
Historical province in the western part of present-day Fukushima Prefecture, part of the old Mutsu Province before the Meiji era.
岩代国は明治時代の初めに陸奥国から分割された。
Iwashiro Province was separated from Mutsu Province at the beginning of the Meiji era.
The name 岩代 (Iwashiro) is a historical province name; the exact origin is uncertain, but it is conventionally associated with the region's geography.