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*1855/1/5 (Feb 21) Commander Adams of the ''Powhatan'' and Japanese representatives exchange ratified copies of the Convention of Kanagawa, completing the agreement process, and the ''Powhatan'' departs Japan the following day.
*1855/1/5 (Feb 21) Commander Adams of the ''Powhatan'' and Japanese representatives exchange ratified copies of the Convention of Kanagawa, completing the agreement process, and the ''Powhatan'' departs Japan the following day.
*1855/1/21 (March 9) The [[Treaty of Amity (Ryukyu-US)|Ryûkyû-USA Treaty of Amity]] is ratified by the US Congress and officially announced by President Franklin Pierce.
*1855/1/21 (March 9) The [[Treaty of Amity (Ryukyu-US)|Ryûkyû-USA Treaty of Amity]] is ratified by the US Congress and officially announced by President Franklin Pierce.
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*1855/5/19 A [[Ryukyuan mission to Edo]] departs from [[Naha]].
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*1855/5/29 The Ryukyuan mission to Edo arrives at [[Kagoshima]].
*1855/10 French ships call at Ryûkyû.
*1855/10 French ships call at Ryûkyû.
*1855/10/2 [[Ansei Earthquake]] strikes Edo.
*1855/10/2 [[Ansei Earthquake]] strikes Edo.