Japanese national legislature. Under the Meiji Constitution, the Diet had two houses, a House of Peers and a House of Representatives, with equal powers. The Diet's role was largely negative: it could block legislation and veto budgets. It was reconstituted under the U.S.-sponsored constitution of 1947. The (upper) House of Councillors seats 247 members, and the (lower) House of Representatives has 480 members. The prime minister, who leads the majority party in the lower house, must be a member. The House of Representatives can override the House of Councillors on most issues.

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