▁H iro sh i ▁I ke uch i . ▁He ▁graduated ▁in ▁ 1 9 3 6 , ▁with ▁a ▁gradu ate ▁th esis ▁on ▁modal ▁systems ▁of ▁popular ▁music ▁of ▁the ▁S ui ▁and ▁Tang ▁D ynast ies . ▁ ▁Upon ▁gradu ation , ▁he ▁co - f ounded ▁( with ▁T adas umi ▁I ida ) ▁a ▁new ▁academic ▁society ▁for ▁the ▁study ▁of ▁Asian ▁music , ▁the ▁T ō y ō ▁O ng aku ▁G ak ka i ▁( So ci ety ▁for ▁Research ▁in ▁A si atic ▁Music ). ▁During ▁this ▁period ▁he ▁was ▁supported ▁by ▁gr ants ▁from ▁the ▁Imperial ▁Academy ▁and ▁the ▁Ke ime i ▁Foundation ▁and ▁was ▁active ▁in ▁colonial ▁field ▁research ▁in ▁Korea ▁( vis ited ▁in ▁ 1 9 4 1 ) ▁and ▁China ▁( vis ited ▁in ▁ 1 9 4 3 ). ▁Upon ▁these ▁vis its , ▁he ▁encountered ▁the ▁surv iving ▁a ak ▁and ▁y ay ue ▁forms , ▁as ▁well ▁as ▁popular ▁the atr ical ▁and ▁instrument al ▁forms . ▁In ▁the ▁ 1 9 4 0 s , ▁he ▁taught ▁senior ▁high ▁school ▁and ▁lect ured ▁in ▁Asian ▁and ▁Japanese ▁music ▁history . ▁ ▁From ▁ 1 9 4 9 ▁to ▁ 1 9 7 3 , ▁he ▁taught ▁at ▁the ▁University ▁of ▁Tokyo , ▁first ▁as ▁an ▁Associ ate ▁Professor , ▁as ▁a ▁ ▁full ▁professor ▁after ▁ 1 9 6 1 , ▁and ▁becoming ▁Emer it us ▁Professor ▁upon ▁ret iring . ▁In ▁this ▁ret irement ,