Hokei (Buddhist law), starting with Nanpo Shomyo (Daio Kokushi [大応国師]), taken over by Shuho Myocho (Daito Kokushi [大灯国師]) and culminating with Kanzan Egen (関山慧玄), is called 'Otokan' (応灯関) to which the Rinzai sects in Japan today all belong.
南浦紹明（大応国師）から宗峰妙超（大灯国師）を経て関山慧玄へ続く法系を「応灯関」といい、現在、日本臨済宗はみなこの法系に属する。