article: Kōka
links: Order of succession Tenpō Emperor Go-Murakami Empress Jitō Emperor Go-Toba Imperial Household Agency Hiroshige U.S. Navy Japanese era name Louis-Frédéric Ceremony Emperor Tenji Sanriku Emperor Fushimi Kaei Emperor Yōzei Emperor Kōmei Richter Scale Tokyo Bay H. Paul Varley Richard Ponsonby-Fane Edo period