In 1940, he was assigned to the privy council, but he received the military repression including the ban on sales of his book, "Nisen Gohyakunen-shi."
昭和15年（1940年）には枢密顧問官に転じるが、軍部の圧迫で『二千五百年史』が発売禁止になるなどの圧迫を受けた。