Task: Text Simplification
Input (English): The J1 League ( Japanese : J1リーク ゙ , Hepburn : J1 Ri ̄ gu ) or simply J1 is the top division of the Japan Professional Football League ( Japanese : 日本フ ゚ ロサッカーリーク ゙ , Hepburn : Nihon Puro Sakka ̄ Ri ̄ gu ) and the top professional association football J.League in Japan .
Output (English): J1 League is the top grouping of the Japan Professional Football League ( 日本フ ゚ ロサッカーリーク ゙ , Nippon Puro Sakka ̄ Ri ̄ gu ) .