Events of the year 1618 in Japan.
Incumbents Monarch: Go-Mizunoo Shogun: Tokugawa Hidetada
Events January 28: Rules for the Ōõku, the section of Edo Castle that houses the shogun's wife and concubines, are established.大奥とは？徳川幕府を支えた“女たちの最前線”を3分で解説 (in Japanese). Shogakukan. 5 October 2021. Archived from the original on 10 June 2023. Retrieved 9 March 2024. date unknown: A comet appears in the sky.Titsingh, Isaac. (1834). Nihon Ōdai Ichiran; ou, Annales des empereurs du Japon. Paris: Royal Asiatic Society, Oriental Translation Fund of Great Britain and Ireland. OCLC 5850691.
Births July 21: Hayashi Gahō, philosopher (d.1688)
References