Tokyo: The Last Megalopolis narrative moves to 1923, Tokyo. Kato retreats to Dalian, China and he and his followers use magic to cause artificial earthquake waves that are amplified to Japan. Kato returns to Tokyo to awaken Masakado's spirit by himself, but is interrupted by Koda Rohan and Junichi Narutaki, who use Kimon Tonkou magic against him. Kato fails to awaken Masakado, but manages to stimulate the Great Kanto Earthquake. The setting moves to 1927. Torahiko Terada has been appointed by Noritsugu Hayakawa as manager of the construction of Japan's first Tokyo Metro Ginza Line. Hayakawa's construction workers run into Kato's shikigami provoking Terada
Imperial Japanese Navy Air Service and the first one to be completed as from the keel up. In the 1920s, the larger percentage of aircraft that were initially acquired and inducted into service, were land based seaplanes whose main tasks were reconnaissance and anti-submarine patrols. The Japanese had drawn up plans for the formation of 17 squadrons of these aircraft, but budgetary constraints limited the units to eleven until 1931. Under the terms of the Washington Naval Treaty two incomplete capital ships were allowed to be rebuilt as carriers, for the Japanese; and . However, "Amagi" was damaged during the Great Kanto earthquake in 1923