*1858/4/25 (June 6) [[Joseph Heco]] (Hamada Hikozô<!--浜田彦蔵-->) becomes the first Japanese to naturalize as a US citizen.
*1858/4/25 (June 6) [[Joseph Heco]] (Hamada Hikozô<!--浜田彦蔵-->) becomes the first Japanese to naturalize as a US citizen.
*1858/5 [[Treaty of Tientsin]] ends the [[Second Opium War]].
*1858/5 [[Treaty of Tientsin]] ends the [[Second Opium War]].
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*1858/5/27-30 [[Ryukyuan mission to Edo]] arrives in [[Kagoshima]], but the mission is ultimately canceled in the 7th month and returns home to Ryûkyû.
*1858/6/19 [[Harris Treaty]] of Amity and Commerce is signed between Japan and the United States.
*1858/6/19 [[Harris Treaty]] of Amity and Commerce is signed between Japan and the United States.
*1858/7/10 [[Dutch-Japanese Treaty of Amity and Commerce]] is signed between Japan and the Netherlands.
*1858/7/10 [[Dutch-Japanese Treaty of Amity and Commerce]] is signed between Japan and the Netherlands.