ical ▁research ▁on ▁chem other apy . ▁ ▁Biography ▁Y osh ida ▁was ▁born ▁in ▁As ak awa , ▁F uk ush ima ▁and ▁graduated ▁from ▁the ▁Medical ▁School , ▁Imperial ▁University ▁of ▁Tokyo ▁in ▁ 1 9 2 7 . ▁He ▁was ▁an ▁assistant ▁professor ▁of ▁path ology ▁at ▁the ▁same ▁institution ▁from ▁ 1 9 2 7 ▁to ▁ 1 9 2 9 . ▁In ▁ 1 9 2 9 ▁he ▁moved ▁to ▁the ▁S as aki ▁Institute ▁to ▁work ▁on ▁chemical - indu ced ▁car cin ogen esis ▁with ▁T aka oki ▁S as aki , ▁before ▁he ▁went ▁to ▁Germany ▁to ▁study ▁path ology ▁in ▁ 1 9 3 5 . ▁ ▁After ▁returning ▁to ▁his ▁hom eland , ▁Y osh ida ▁served ▁as ▁a ▁professor ▁of ▁path ology ▁at ▁Nag as aki ▁University ▁from ▁ 1 9 3 8 ▁to ▁ 1 9 4 4 , ▁T oh oku ▁University ▁from ▁ 1 9 4 4 ▁to ▁ 1 9 5 2 , ▁before ▁being ▁appointed ▁as ▁a ▁professor ▁of ▁path ology ▁at ▁the ▁Fac ulty ▁of ▁Medicine , ▁University ▁of ▁Tokyo ▁in ▁ 1 9 5 2 , ▁where ▁he ▁became ▁a ▁de an ▁in ▁ 1 9 5 8 . ▁In ▁addition , ▁he ▁became ▁a ▁director ▁at ▁the ▁S as aki ▁Institute ▁in ▁ 1 9 5 3 ▁and ▁at ▁the ▁Can cer ▁Institute , ▁Japanese ▁Foundation ▁for ▁Can cer ▁Research ▁in ▁ 1 9 6 3 . ▁ ▁Y osh ida ▁died ▁in ▁