noun
Sado Province (historical)
Historical province that covered Sado Island; now part of Niigata Prefecture.
佐渡はかつて佐渡国と呼ばれる一つの国だった。
Sado was once a province called Sado no kuni.
noun
Sado Island
Island in Niigata Prefecture, known for its gold mine and traditional culture.
夏休みに佐渡へ旅行に行く予定です。
I plan to travel to Sado Island during summer vacation.