>>427The earliest use of Chotto Toorimasu yo (ちょっと通りますよ) / The Man in the Emperor's Prostate (天皇陛下の前立腺の中の人) / Nurukopop (ぬるコぽっぷ) that I could find was 2003, which is roughly around the time when Emperor Akihito was diagnosed with prostate cancer.