y oshi ▁and ▁resolved . ▁In ▁ 1 5 8 9 , ▁H ide y oshi ▁dec ides ▁the ▁San ada ▁cl an ▁would ▁rel in qu ish ▁all ▁of ▁its ▁domain ▁east ▁of ▁T one ▁River , ▁including ▁Num ata ▁Castle , ▁to ▁the ▁H ō j ō ▁cl an . ▁In ▁turn , ▁he ▁granted ▁them ▁some ▁territory ▁in ▁southern ▁Shin ano . ▁However , ▁by ▁the ▁end ▁of ▁that ▁year , ▁In om ata ▁Kun in ori , ▁a ▁retain er ▁from ▁the ▁H ō j ō ▁cl an ▁who ▁was ▁now ▁holding ▁Num ata ▁Castle , ▁is ▁dece ived ▁into ▁attack ing ▁the ▁nearby ▁Nag ur umi ▁Castle , ▁located ▁west ▁of ▁T one ▁River ▁and ▁def ended ▁by ▁San ada ▁forces . ▁The ▁attack ▁is ▁successful ▁and ▁the ▁castle ▁is ▁seized ▁by ▁H ō j ō ▁forces , ▁but ▁by ▁this ▁time , ▁Toy ot omi ▁H ide y oshi ▁had ▁san ction ed ▁a ▁rule ▁which ▁prohib ited ▁da im y ō s ▁from ▁eng aging ▁in ▁battle ▁over ▁private ▁disput es . ▁This ▁incident ▁fully ▁bre ached ▁this ▁rule ▁and ▁it ▁would ▁go ▁on ▁to ▁become ▁the ▁reason ▁of ▁the ▁Sie ge ▁of ▁O da w ara ▁in ▁ 1 5 9 0 , ▁and ▁the ▁subsequent ▁fall ▁of ▁the ▁H ō j ō ▁cl an . ▁▁▁▁▁▁ ▁After ▁H ide y oshi ' s ▁death ▁in ▁ 1 5 9 8 , ▁Mas ay uki ▁joined ▁I sh ida ▁M its un ari ' s