Tenpô 11 (天保十一年)
Timeline of 1840
- 1840/7 Representatives of the Dutch East India Company arrive at Nagasaki and inform of the outbreak of the Opium War.
- 1840/9 Takashima Shûhan offers a proposal to the shogunate on the production and use of artillery.
- 1840/11 Sanbôryôchigae - The daimyo of Shônai (Dewa province), Kawagoe han (Musashi province), and Nagaoka han (Echigo province) are moved to one another's territories. Following violent resistance by the people of Shônai, the order is withdrawn.
Other Events of 1840
- James Hepburn arrives in China.
- Manabe Akikatsu is named rôjû.
- The Opium War begins in China (~1842).
Births and Deaths
- Prime Minister Kuroda Kiyotaka is born (d. 1900).
- Harada Sanosuke, member of the Shinsengumi, is born (d. 1868).
- Itô Tetsugorô, member of the Shinsengumi, is born (d. 1868).
- Alfred T. Mahan is born (d. 1914).
- Shibusawa Eiichi is born (d. 1931).
- Yoshimura Kan'ichirô, member of the Shinsengumi, is born (d. 1868).