Jan Cock Blomhoff

Jan Cock Blomhoff (Amsterdam, 5 August 1779 – Amersfoort, 15 August 1853) was director ("opperhoofd") of Dejima, the Dutch trading colony in the harbour of Nagasaki, Japan, 1817–1824,[1] succeeding Hendrik Doeff.

During his first stay on the island (1809–1813) he had an affair with a Japanese woman and the couple had a child, who died in 1813.

When he arrived in Dejima for the second time in August 1817 he was accompanied by his wife Titia Bergsma, whom he had married in 1815; his son Johannes; Petronella Muns, a Dutch wetnurse; and an Indonesian maid. The ladies and the little boy were not allowed to stay. In the short time they stayed there, till December 1817, they were often drawn by artists, who had never seen other than Japanese women, and 500 different prints widely circulated throughout the country.

Blomhoff is commemorated in the specific name of an Asiatic pit viper, Gloydius blomhoffii.[2]

See also


  1. Historiographical Institute. (1988). Historical documents relating to Japan in foreign countries, Vol. I, p. 65.
  2. Beolens, Bo; Watkins, Michael; Grayson, Michael (2011). The Eponym Dictionary of Reptiles. Baltimore: Johns Hopkins University Press. xiii + 296 pp. ISBN 978-1-4214-0135-5. ("Blomhoff", p. 28).


  • Effert, Rudy. (2008). Royal Cabinets and Auxiliary Branches. Leiden: Research School CNWS. ISBN 9789057891595; OCLC 244247206
  • Historiographical Institute, the University of Tokyo (東京大学史料編纂所, Tokyo daigaku shiryō hensan-jo). (1963). Historical documents relating to Japan in foreign countries: an inventory of microfilm acquisitions in the library of the Historiographical Institute, the University of Tokyo. OCLC 450710
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