It was not without a high cost, however, for after being awarded his doctorate he became seriously ill with pleurisy and this prevented him returning to the University of Tokyo until April 1947.
Ito ay hindi na walang isang mataas na gastos, gayunman, para matapos na iginawad sa kanyang titulo ng doktor siya ay naging malubha sa pamamaga ng pliyura at ito pumigil sa kanya bumabalik sa University of Tokyo hanggang Abril 1947.