Nijuhachi-bon (twenty-eight chapters) forming Myohorenge-kyo are divided into two part; the early part is called 'Shakumon' (the Trace Gate) and the latter part is called 'Honmon' (the Source Gate).
所依の妙法蓮華経を構成する二十八品（28章）は前半の「迹門」、後半の「本門」に二分される。