the throne; the crown
Refers to the position or rank of a monarch. Used in contexts of succession, abdication, or royal authority.
The prince succeeded to the throne.
The king resolved to abdicate the throne.
The prince succeeded to the throne after his father's death.
He ascended the throne at the age of twenty.
The aging king abdicated the throne to his son.
The rebel army tried to seize the throne.
王座 can denote the literal throne seat as well as the position of power, whereas 王位 refers strictly to the rank or title itself.
Compound of 王 (king) and 位 (rank, position). The reading is on'yomi.