Kutsuki Masatsuna

Kutsuki Masatsuna (朽木 昌綱, March 5, 1750 – May 18, 1802), also known as Kutsuki Oki-no kami Minamoto-no Masatsuna, was a hereditary Japanese daimyō of Oki and Ōmi with holdings in Tanba and Fukuchiyama.

[1] His warrior clan was amongst the hereditary vassals of the Tokugawa family (the fudai) in the Edo period.

Masatsuna was a polymath and a keen student of whatever information was available at that time concerning the West.

The oldest surviving letter from Masatsuna to Titsingh dates from 1789;[3] and this letter mentions mutual friends such as Shimazu Shigehide (the father-in-law of the eleventh shōgun, Tokugawa Ienari) and Kuze Hirotami (Nagasaki bugyō or governor of Nagasaki port).

[5] Kutsuki's published writings encompass 8 works in 12 publications in 1 language and 25 library holdings.