Chinkai Guard District
Located in southern Korea ( at present-day Jinhae , Republic of Korea , ) , the Chinkai Guard District was responsible for control of the strategic Straits of Shimonoseki and for patrols along the Korean coastline and in the Sea of Japan . 
<triplet> Jinhae <subj> Republic of Korea <obj> country <triplet> Republic of Korea <subj> Sea of Japan <obj> located in or next to body of water <triplet> Sea of Japan <subj> Republic of Korea <obj> basin country