o ▁In land ▁Sea ▁( in ▁Japanese : ▁Set ona ikai ). ▁The ▁city ▁faces ▁the ▁In land ▁Sea ▁on ▁its ▁eastern ▁and ▁southern ▁parts . ▁The ▁climate ▁is ▁moder ate . ▁Its ▁main ▁indust ries ▁are ▁fish ery , ▁agricult ure , ▁pot tery , ▁and ▁sight see ing . ▁ ▁History ▁ ▁Port ▁U sh im ado ▁was ▁a ▁famous ▁port ▁till ▁the ▁early ▁modern ▁era . ▁It ▁served ▁mess engers ▁from ▁Korea ▁to ▁the ▁Tok ug awa ▁Sh og un ate . ▁The ▁port ▁is ▁today ▁a ▁good ▁spot ▁for ▁sight see ing ▁and ▁sail ing . ▁Os af une ▁was ▁famous ▁for ▁the ▁production ▁of ▁kat ana ▁in ▁the ▁ 1 2 th ▁century ▁under ▁the ▁name ▁of ▁B izen ▁Os af une ▁( Os af une , ▁B izen ▁Province ). ▁Fu ku oka ▁District , ▁which ▁fl our ished ▁as ▁a ▁trade ▁center ▁and ▁later ▁a ▁political ▁center ▁along ▁the ▁Set o ▁In land ▁Sea ▁until ▁the ▁beginning ▁of ▁the ▁E do ▁period , ▁served ▁by ▁the ▁Y osh ii ▁River ▁and ▁the ▁Set o ▁In land ▁Sea , ▁is ▁also ▁included ▁as ▁a ▁part ▁of ▁the ▁city . ▁ ▁The ▁Fu ku oka ▁Market ▁( F u ku oka ▁no ▁I chi ) ▁was ▁recorded ▁in ▁the ▁scroll ▁I ppen ▁Sh on in ▁Em aki , ▁drawn ▁in ▁the ▁ 1 3 th ▁century . ▁At ▁the ▁end ▁of ▁the ▁Kam ak ura ▁period ▁a ▁castle ▁was ▁built ▁in ▁Fu ku oka . ▁In ▁the ▁middle