ored ▁to ▁be ▁a ▁dangerous ▁rit ual ▁if ▁carried ▁out ▁without ▁proper ▁init iation . ▁It ▁is ▁believed ▁that ▁if ▁the ▁rit ual ▁is ▁performed ▁incorrectly , ▁it ▁can ▁attract ▁unw anted ▁entities . ▁ ▁Ry ob u ▁k u ji ▁The ▁earliest ▁known ▁Japanese ▁application ▁of ▁the ▁k u ji ▁comes ▁from ▁the ▁Sh ing on ▁mon k ▁K ak ub an ▁( 1 0 9 5 – 1 1 4 3 ▁CE ) ▁who ▁was ▁an ▁academic ▁of ▁Tal uan ’ s ▁writ ings ▁and ▁teach ings . ▁K ak ub an ▁introduced ▁several ▁k u ji ▁formulas ▁dedicated ▁to ▁Am it ā b ha , ▁in ▁his ▁text ▁The ▁Ill umin ating ▁Secret ▁Comment ary ▁on ▁the ▁Five ▁C ak ras ▁and ▁the ▁N ine ▁Sy ll ables ▁( 五 <0xE8> <0xBC> <0xAA> 九 字 明 <0xE7> <0xA7> <0x98> 密 義 <0xE9> <0x87> <0x88> , ▁Gor in ▁k u ji ▁my ō ▁him its u ▁g ish aku ▁or ▁ 五 <0xE8> <0xBC> <0xAA> 九 字 ▁Gor in ▁k u ji ▁his h aku ). ▁▁ ▁The ▁k u ji ▁formulas ▁K ak ub an ▁introdu ces ▁are ▁commonly ▁grouped ▁under ▁the ▁title ▁z ok ush u , ▁and ▁are ▁completely ▁un related ▁to ▁original ▁T ao ist ▁k u ji . ▁The ▁mon k ▁Shin ran ▁( 1 1 7 3 – 1 2 6 3 ▁CE ), ▁founder ▁of ▁J ō do ▁Shin sh ū ▁sect , ▁introduced ▁several ▁new ▁k u ji ▁formulas , ▁also ▁dedicated ▁to