*Russian navigator [[Adam von Krusenstern]] encounters two Japanese/Ainu trading posts on [[Sakhalin]].
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*[[Saga han]] establishes a domainal monopoly over [[Imari porcelain]].
*[[Shiba Kokan|Shiba Kôkan]] writes his ''[[Seiyo gaho|Seiyô gahô]]'' ("Laws of Western Pictures").
*[[Shiba Kokan|Shiba Kôkan]] writes his ''[[Seiyo gaho|Seiyô gahô]]'' ("Laws of Western Pictures").
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*Publication begins of a ''[[Suikoden]]'' adaptation written by [[Takizawa Bakin]] and illustrated by [[Hokusai]]. This is the first version of the story to be made widely available in Japanese.
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===Births and Deaths===
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*1805/4/10 [[Tachibana Nankei]] dies (b. [[1753]]).
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*[[Abe Masatomo]], daimyô of [[Bingo Fukuyama han]], dies (b. [[1745]]).