1 9 3 9 , ▁Iz umi ▁was ▁an nex ed ▁by ▁the ▁neighbor ing ▁city ▁of ▁Y ok oh ama , ▁becoming ▁part ▁of ▁T ots uka ▁Ward . ▁In ▁a ▁major ▁administrative ▁re organ ization ▁of ▁October ▁ 1 , ▁ 1 9 6 9 , ▁T ots uka ▁Ward ▁was ▁divided , ▁and ▁Iz umi ▁emer ged ▁as ▁an ▁independent ▁w ard ▁within ▁Y ok oh ama . ▁ ▁Econom y ▁Iz umi ▁Ward ▁is ▁largely ▁a ▁regional ▁commercial ▁center ▁and ▁bed room ▁community ▁for ▁central ▁Y ok oh ama ▁and ▁Tokyo . ▁In ▁ 1 9 9 6 , ▁in ▁conj unction ▁with ▁the ▁San ▁Diego - Y ok oh ama ▁sister ▁city ▁relationship , ▁S ot ets u ▁Real ▁Est ate ▁Co ., ▁Ltd . ▁developed ▁and ▁constructed ▁ten ▁imported ▁housing ▁units , ▁using ▁construction ▁documents ▁and ▁building ▁materials ▁from ▁the ▁United ▁States , ▁with ▁a ▁San ▁Diego ▁theme ▁and ▁style . ▁The ▁project ▁was ▁called ▁San ▁Diego ▁Street ▁of ▁Dream s , ▁in ▁total , ▁ 3 0 ▁such ▁import ▁housing ▁units ▁were ▁constructed ▁and ▁still ▁remain ▁today ▁in ▁Ry ok uent oshi , ▁Iz umi - ku . ▁ ▁Education ▁University : ▁Ferr is ▁University ▁ ▁Senior ▁high ▁schools : ▁Sh ō y ō ▁High ▁School ▁Sh ū ei ▁High ▁School ( Cor respond ence ) ▁Y ok oh ama ▁Sh ū y ū kan ▁High ▁School ▁Y ok oh ama ▁Ry ok uen ▁So h g oh ▁High ▁School ▁ ▁Junior ▁high ▁schools : ▁