決けっ勝しょう戦せんけっしょうせんCommon wordMeanings1nounchampionship game; finals; deciding roundRefers to the final match or round that determines the winner of a tournament or competition.明日あしたはいよいよ決けっ勝しょう戦せんだ。Tomorrow is finally the championship game.彼かれは決けっ勝しょう戦せんで優ゆう勝しょうした。He won the championship in the finals.