関かん税ぜい法ほうかんぜいほうMeanings1nounCustoms ActlawRefers to the Japanese Customs Act (関税法), the law governing customs duties and procedures. Domain-specific legal term.関かん税ぜい法ほうに基もとづき、輸ゆ入にゅう品ひんには関かん税ぜいが課かされる。Under the Customs Act, tariffs are imposed on imported goods.