Ryosenji Temple

Ryosenji Temple in Shimoda holds a central place in modern Japanese history as the site where the Treaty of Shimoda was negotiated and signed in 1854 between representatives of the United States, led by Commodore Matthew Perry, and the Tokugawa shogunate, formalizing the terms of Japan's opening to American trade and diplomatic relations after more than two centuries of largely closed-door foreign policy under the sakoku system. The temple, a modest Soto Zen establishment founded centuries earlier, was chosen as neutral negotiating ground because of Shimoda's status as one of the two ports opened under the preceding Convention of Kanagawa. The temple's Treasure Museum, built alongside the main hall, houses documents, artifacts, and reproductions related to the treaty negotiations, including items connected to Perry's mission and to Tojin Okichi, a local woman whose life became entwined with the folklore surrounding the era of foreign contact at Shimoda. Alongside the treaty-related exhibits, the museum's upper floor displays a separate collection of historical art and artifacts unrelated to the 1854 negotiations, giving the site a dual identity as both a diplomatic history site and a general local history museum. The main temple hall retains its Edo-period wooden structure and modest Zen temple layout, while the grounds include a small garden and the graves associated with the Shimoda-era foreign contact period. The site's compact scale reflects its origins as a working local temple rather than a purpose-built monument, with the historical significance of the 1854 negotiations layered onto an otherwise unassuming religious building.