ansion ), ▁built ▁by ▁ Ō ta ▁Su ke k ats u ▁after ▁the ▁earth qu ake , ▁and ▁registered ▁with ▁the ▁government ▁in ▁ 1 9 8 0 ▁as ▁an ▁Import ant ▁Cultural ▁Property . ▁ ▁Other ▁surv iving ▁port ions ▁of ▁the ▁castle ▁included ▁a ▁portion ▁of ▁the ▁mo ats ▁and ▁stone ▁walls , ▁and ▁the ▁drum ▁house . ▁A ▁gate ▁from ▁the ▁main ▁ba iley ▁of ▁the ▁castle ▁built ▁in ▁ 1 6 5 9 ▁was ▁given ▁to ▁the ▁Buddh ist ▁temple ▁of ▁Y us an - ji ▁in ▁Fu ku ro i , ▁where ▁it ▁now ▁serves ▁as ▁the ▁main ▁gate ▁of ▁that ▁temple . ▁It ▁is ▁also ▁a ▁National ▁I CP . ▁ ▁In ▁April ▁ 1 9 9 4 , ▁sections ▁of ▁the ▁inn erm ost ▁ba iley ▁( hon mar u ), ▁including ▁some ▁walls , ▁a ▁y ag ura , ▁and ▁the ▁keep ▁( t ens h uk aku ), ▁were ▁re construct ed ▁using ▁the ▁original ▁methods . ▁The ▁tens h uk aku ''' s ▁reconst ruction ▁was ▁done ▁based ▁on ▁a ▁few ▁diag rams ▁of ▁the ▁original ▁tens h uk aku ▁that ▁surv ived , ▁and ▁marked ▁the ▁first ▁time ▁in ▁post - war ▁Japan ▁that ▁a ▁tens h uk aku '' ▁had ▁been ▁re construct ed ▁in ▁wood ▁using ▁the ▁original ▁construction ▁methods . ▁The ▁cost ▁of ▁ 1 ▁billion ▁y en ▁for ▁the ▁reconst ruction ▁was ▁raised ▁largely ▁through ▁public ▁don ation . ▁In ▁ 2 0 0 6 , ▁the