▁route ▁design ation ▁applied ▁to ▁multiple ▁dis continu ous ▁road ▁segments ▁among ▁the ▁many ▁count ies . ▁The ▁list ▁below ▁describes ▁the ▁sections ▁in ▁each ▁county ▁that ▁are ▁designated ▁SR ▁ 6 6 3 . ▁ ▁List ▁ ▁References ▁ ▁External ▁links ▁▁ 6 6 3 <0x0A> </s> ▁is ▁one ▁of ▁the ▁ 1 8 ▁w ards ▁of ▁the ▁city ▁of ▁Y ok oh ama ▁in ▁Kan ag awa ▁Pref ect ure , ▁Japan . ▁In ▁ 2 0 1 0 ▁the ▁w ard ▁had ▁an ▁estimated ▁population ▁of ▁ 1 5 5 , 6 7 4 ▁and ▁a ▁density ▁of ▁ 6 , 6 2 0 ▁persons ▁per ▁km ². ▁The ▁total ▁area ▁was ▁ 2 3 . 5 1   km ². ▁ ▁Geography ▁Iz umi ▁Ward ▁is ▁located ▁in ▁eastern ▁Kan ag awa ▁Pref ect ure , ▁and ▁on ▁the ▁central - western ▁borders ▁of ▁the ▁city ▁of ▁Y ok oh ama . ▁The ▁area ▁is ▁largely ▁flat land , ▁with ▁scattered ▁small ▁hills . ▁ ▁S urr ounding ▁municipal ities ▁Se ya ▁Ward ▁As ah i ▁Ward ▁T ots uka ▁Ward ▁Yam ato , ▁Kan ag awa ▁F uj is awa , ▁Kan ag awa ▁ ▁History ▁The ▁area ▁around ▁present - day ▁Iz umi ▁Ward ▁has ▁been ▁inhab ited ▁continu ously ▁for ▁thousands ▁of ▁years . ▁Arch ae olog ists ▁have ▁found ▁stone ▁tools ▁from ▁the ▁Japanese ▁Pale ol ith ic ▁period ▁and ▁cer am ic ▁sh ards ▁from ▁the ▁J ō mon ▁period , ▁and ▁tomb s