了仙寺（Ryosenji Temple）是1854年日美签订友好条约附录下田条约的历史性场所，被日本指定为国家史迹。每年举办的黑船祭在此再现日美友好条约的签订仪式。宝物馆展览有当年的有关公文和黑船舰队来日的画卷，并收藏有有关黑船舰队的文物100多件。在此可了解日本最初是如何开放国门，开展对外交流和经济贸易的历史。
　　Ryosenji Temple was in 1854 Japan and US signs the friendship treaty appendix to go the fields the treaty the historical place, is assigned by Japan for the national historical site. Every year conducts the black ship offers a sacrifice to this reappears the Japanese and US friendship treaty the signing ceremony. The treasure hall display had same year's related archives and the black ship team comes the date the picture scroll, and collected has related black ship team's cultural relic more than 100. In this may understand how Japan is at first opens the entrance to a country, the development foreign exchange and the economical trade history.