Kutsuki Masatsuna

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In this Japanese name, the family name is Kutsuki.

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 daimyo of Oki and Ōmi with holdings in Tamba 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. Since most printed material was only available in the Dutch language, such studies were commonly called "Dutch learning" (rangaku).[2]

Dutch Japanologist Isaac Titsingh considered Masatsuna to have been his closest friend while he was in Japan, and their correspondence continued after Titsingh last left Dejima for the last time. 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 shogun, Tokugawa Ienari) and Kuze Hirotami (Nagasaki bugyō or governor of Nagasaki port).[4]

Masatsuna and Titsingh shared an interest in numismatics. After Titinsgh was reassigned from Japan in 1784, he sent packages of coins from India—Dutch coppers, as well as coins from India, Russia, Turkey, and Africa. Titsingh in turn received Japanese and Chinese coins as gifts.[2]

Masatsuna was an author of several treatises on numismatics. He was the first in Japan to circulate a book about non-Japanese coins with impressions taken from actual coins which had been obtained from Western traders.

Events of a daimyo's life[edit]

  • 1789 (Kansei 1): This rangaku/geographer scholar's book, Taisei yochi zusetsu ("Illustrated explanation of Western geography"), was published.[8]
  • 1800 (Kansei 11): Masatsuna retires, handing over his position and titles to his son, Mototsuna.[9]
  • 1801 (Kansei 12): Mototsuna predeceased his father, and Masatsuna's grandson, Tsunagata becomes daimyo.[10]
  • 1802 (Kansei 13): Masatsuna dies.[10]
  • 1807 (Bunka 4): Isaac Titsingh sends his last letter to Masatsuna from Europe, not knowing that his old friend had died some years earlier.[7] Titsingh's decided to dedicate his translation of Nihon Ōdai Ichiran to Masatsuna.[11]

Selected work[edit]

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

  • 1781 -- Newly selected manual of numismatics (Shinzen zenpu)[5]
  • 1785 -- Corrected Illustrated mirror of coinage (改正孔方圖鑑 Kaisei kōhō zukan?);[6] note that only one copy known to exist.[13]
  • 1787 -- Notes on Western Coinage (西洋銭譜 Seiyō zenpu?, OCLC 249942145), also romanized as Seiyō senpu[8]
  • 1789 -- Illustrated Explanation of Western Geography (泰西輿地図說 Taisei yochi zusetsu?, OCLC 440015493).[8]
  • 1790 — Former and Present Coin Appraisal (古今泉貨鑑 Kokon senka kagami?, OCLC 050737460)


  1. ^ a b Titsingh, Issac. (1834). Annales des empereurs du japon, p. 420.
  2. ^ a b Fleming, William. Book review: Secret Memoirs of the Shoguns: Isaac Titsingh and Japan, 1779-1822," Southeast Review of Asian Studies, Annual, 2006.
  3. ^ Screech, Timon. (2006). Secret Memoirs of the Shoguns: Isaac Titsingh and Japan, 1779-1822, p. 36.
  4. ^ Screech, p. 152.
  5. ^ a b Screech, p. 67.
  6. ^ a b Screech, p. 34.
  7. ^ a b Screech, p. 36.
  8. ^ a b c d Screech, p. 33.
  9. ^ Screech, pp. 36-38.
  10. ^ a b Screech, p. 38.
  11. ^ Titisingh, pp. v-vi.
  12. ^ WorldCat Identities: 朽木昌綱 1750-1802
  13. ^ Screech, p. 225 n146.


Further reading[edit]

  • The private correspondence of Kutsuki Masatsuna and Isaac Titsingh, 1785-1807: compiled in celebration of the friendship between Kutsuki Masatsuna and Isaac Titsingh, Fukuchiyama, November 1992. OCLC 069107485