en ob u ▁switched ▁the ▁title ▁back ▁to ▁king , ▁only ▁to ▁be ▁changed ▁once ▁again ▁to ▁ta ik un ▁by ▁Tok ug awa ▁Y osh im une . ▁ ▁While ▁Japanese ▁em per ors ▁had ▁claimed ▁the ▁title ▁of ▁T enn ō ▁( 天 皇 ; ▁lit . ▁" he aven ly ▁so ver eign "; ▁equivalent ▁to ▁the ▁Chinese ▁hu ang di , ▁from ▁which ▁the ▁term ▁origin ated ) ▁and ▁Son ▁of ▁Heaven ▁( 天 子 ) ▁dom est ically ▁since ▁the ▁ 7 th ▁century ▁CE , ▁Chinese ▁em per ors ▁had ▁never ▁officially ▁recognize ▁their ▁claim ▁to ▁the ▁title . ▁Like wise , ▁Korean ▁r ul ers ▁referred ▁to ▁Japanese ▁monarch s ▁as ▁il ▁w ang ▁( 일 왕 / 日 王 ). ▁ ▁Korea ▁ ▁In ▁ 9 1 8 , ▁T ae jo ▁of ▁G ory e o ▁was ▁con ferred ▁the ▁title ▁of ▁King ▁of ▁G ory e o ▁( 高 <0xE9> <0xBA> <0x97> 國 王 ) ▁by ▁the ▁Emperor ▁M ing z ong ▁of ▁Later ▁Tang . ▁Prior ▁to ▁its ▁capit ulation ▁to ▁the ▁Y uan ▁dynast y , ▁imperial ▁design ations ▁and ▁termin ology ▁were ▁widely ▁used ▁by ▁G ory e o ▁dom est ically . ▁Its ▁r ul ers ▁claimed ▁to ▁be ▁the ▁Son ▁of ▁Heaven , ▁as ▁did ▁Chinese ▁em per ors . ▁G ye ong sun ▁of ▁S illa ▁addressed ▁T ae jo ▁of ▁G ory e o ▁as ▁the ▁Son ▁of ▁Heaven ▁when ▁he ▁capit ulated . ▁Even ▁though