This text is missing some spaces, please add them: Heheldthispostuntilheretiredin1967.HoweverthiswasnottheendofhiscareerforhewasvisitingProfessoratNancyinFranceduring1967-68andthenProfessoratGakushuimUniversityfor10yearsfrom1967to1977.
He held this post until he retired in 1967. However this was not the end of his career for he was visiting Professor at Nancy in France during 1967-68 and then Professor at Gakushuim University for 10 years from 1967 to 1977.