Ninagawa kept acting from the standpoint of Protecting the Constitution also in the field of local government all along the line, such that, on the Constitution Memorial Day, he delivered his address standing before a Japanese folding screen with the Preface to the Constitution of Japan on its panels.
そして、憲法記念日には日本国憲法前文を記した屏風を背に訓示するなど、地方自治の現場でも一貫して護憲の立場を実践し続けた。