▁J ō ky ū ▁War ▁and ▁Mong ol ▁invas ions ▁of ▁the ▁ 1 3 th ▁century , ▁the ▁ Ō n in ▁War ▁was ▁fought ▁primarily ▁in ▁Ky oto , ▁and ▁thus ▁the ▁war rior ▁mon ks ▁could ▁no ▁longer ▁remain ▁non - vi ol ent ▁and ▁neutral . ▁ ▁In ▁addition , ▁a ▁new ▁bre ed ▁of ▁war rior ▁mon ks ▁was ▁forming ▁in ▁the ▁coun tr ys ide . ▁Where ▁the ▁mon ks ▁of ▁Mount ▁H iei ▁had ▁subscri bed ▁to ▁the ▁teach ings ▁of ▁the ▁T end ai ▁sect , ▁these ▁new ▁groups , ▁calling ▁themselves ▁I kk ō - ik ki , ▁followed ▁the ▁dict ates ▁of ▁the ▁J ō do ▁Shin sh ū ▁sect ▁of ▁belief s . ▁They ▁were ▁essentially ▁coal itions ▁of ▁religious ▁fundamental ist ▁pri ests , ▁far mers , ▁and ▁families , ▁who ▁were ▁willing ▁to ▁literally ▁fight ▁for ▁their ▁belief s . ▁I kk ō - ik ki ▁transl ates ▁to ▁something ▁like ▁" dev oted ▁league ", ▁but ▁also ▁had ▁the ▁con notation ▁of ▁" single - mind ed ▁ri ots ". ▁In ▁ 1 4 8 8 , ▁their ▁leader ▁Ren ny o , ▁inc ited ▁an ▁u pr ising ▁against ▁sam ur ai ▁rule , ▁and ▁secured ▁K aga ▁Province ▁for ▁the ▁I kk ō - ik ki . ▁From ▁there ▁they ▁spread , ▁establish ing ▁themselves ▁in ▁Nag ash ima , ▁I sh iy ama ▁Hong an - ji , ▁and ▁Mik awa ▁Province . ▁Their ▁growing ▁power