Amenomori Hoshu

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  • Born: 1668
  • Died: 1755
  • Other Names: 雨森東五郎 (Amenomori Tougorou)
  • Japanese: 雨森芳洲 (Amenomori Houshuu)

Amenomori Hôshû was a prominent Confucian advisor to the lords of Tsushima han.

He studied under Kinoshita Jun'an before entering the service of Tsushima.

In the early years of the 18th century, shogunal advisor Arai Hakuseki, a fellow student of Jun'an, sought to revise much of the protocols and practices used in diplomatic exchanges with Korea. These included abandoning the term taikun ("Great Prince") to refer to the shogun, and the adoption instead of Nihon kokuô ("King of Japan"), a term explicitly rejected by [[Hayashi Razan] in 1635. Amenomori opposed these changes, but was unsuccessful.[1]

At the age of 57, he was among the extensive Tsushima entourage which escorted the 1711 Korean embassy to Edo. He is seen in numerous paintings and prints depicting the street processions or other aspects of that embassy mission.[1]

Throughout much of his career, from the 1690s until as late as the 1740s, Amenomori argued forcefully in support of the importance of Tsushima's trade and diplomatic relations with Korea, fighting for concessions or aid from the shogunate to help support the continuation of these relations. One example of this is seen in 1695, when a severe debasement of the currency by the shogunate damaged Tsushima's ability to offer tribute (or pay for Korean goods) in sufficiently high-quality silver. This problem deepened when a decrease in Korean production of ginseng caused prices of that precious commodity to double. In the end, though, as the result of memorials to the rôjû penned by Amenomori and others, in 1711 the shogunate granted Tsushima special permission to use 80% silver ingots, rather than the further debased ones now standard throughout the realm.[2] Amenomori also argued for the importance of Tsushima's activities for the intelligence information it brought in, via Korea, about events and developments in the outside world; he compared this to loyal service in coastal defense. As a result, after much memorializing, in 1748 the shogunate finally granted Tsushima exemption from obligations to contribute men or materiel to the defense of the port of Nagasaki. In 1753, however, towards the very end of his life, while he may have still been supportive of continued trade relations, Amenomori suggested or supported terminating the practice of sending Korean embassies to Edo. He cited that the missions were too expensive, for the Korean court and various Japanese parties alike, and that they were "not of great benefit to the Japanese realm."[3]

A memorial hall and library dedicated to him, called Hôshû Shoin, operates today in Amenomori's hometown in Shiga prefecture.


  1. 1.0 1.1 Ronald Toby, "Carnival of the Aliens," Monumenta Nipponica 41:4 (1986), 435-436.
  2. Robert Hellyer, Defining Engagement, Harvard University Press (2009), 60.
  3. Hellyer, 105.