Despite managing to publish his "Consideration on the Emperors' Posthumous Names," his health began to worsen so he personally selected and asked Masuzo YOSHIDA to succeed his work, and Yoshida later contributed to completing the unfinished "Gengoko" (Consideration on the Era) and proposed the era name 'Showa.'
しかし『天諡考』は刊行したものの、病状の悪化により、自ら見いだした吉田増蔵に後を託しており、後年この吉田が未完の『元号考』の刊行に尽力し、元号案「昭和」を提出することとなった。