was a after Kan'ei and before Keian. This period spanned the years from December 1644 through February 1648. The reigning emperor was .

Change of era

  • 1644 : The era name was changed to Shōhō to mark the enthronement of the new emperor Go-Kōmyō. The previous era ended and a new one commenced in Kan'ei 21, on the 16th day of the 12th month.

Events of the Shōhō era

  • 1644 (Shōhō 1): The third major map of Japan was ordered by the Tokugawa Shogunate—the first having been completed in Keichō 10—at a scale of 1:432,000 (based on maps of the provinces drawn to a scale of 1:21,600).
  • May 18, 1645 (Shōhō 2, 23rd day of the 4th month)<!-- NengoCalc 正保二年四月二十三日 -->: The Shōgun was elevated the court role of .