▁the ▁inv ading ▁H ō j ō ▁army ▁at ▁the ▁Battle ▁of ▁K ann ag awa . ▁In ▁that ▁occasion , ▁Mas ay uki ▁actually ▁esc orted ▁back ▁Kaz um as u ' s ▁remaining ▁forces ▁through ▁Su wa , ▁in ▁Shin ano . ▁Though , ▁seeing ▁this ▁chance , ▁Mas ay uki ▁sent ▁his ▁uncle ▁Y az awa ▁Y or its una ▁and ▁took ▁back ▁Num ata ▁Castle . ▁Also , ▁he ▁put ▁his ▁oldest ▁son ▁Nob uy uki ▁in ▁charge ▁of ▁I w ab its u ▁Castle , ▁further ▁rein for cing ▁eastern ▁K ō zu ke . ▁On ▁July ▁ 1 0 th , ▁U es ug i ▁K age k ats u ▁inv aded ▁Northern ▁Shin ano . ▁Mas ay uki ▁s ided ▁with ▁the ▁U es ug i ▁initially , ▁but ▁a ▁couple ▁of ▁weeks ▁later ▁he ▁defect ed ▁to ▁H ō j ō ' s ▁side . ▁Both ▁U es ug i ▁and ▁Ho jo ' s ▁arm ies ▁came ▁to ▁face ▁each ▁other ▁at ▁K aw an ak aj ima ▁on ▁July ▁ 3 0 th , ▁but ▁direct ▁combat ▁was ▁avoided ▁as ▁the ▁H ō j ō ▁army ▁turned ▁back ▁and ▁advanced ▁south ▁towards ▁K ai ▁province , ▁which ▁was ▁in ▁turn ▁inv aded ▁by ▁Tok ug awa ▁forces . ▁Meanwhile , ▁one ▁of ▁U es ug i ▁cl an ' s ▁major ▁retain er , ▁Sh ib ata ▁Sh ige ie , ▁revol ted ▁and ▁U es ug i ' s ▁forces ▁also ▁had