* 1538/10/7 [[Hojo Ujitsuna|Hôjô Ujitsuna]] defeats [[Satomi Yoshitaka]] and [[Ashikaga Yoshiaki]] at the [[First Battle of Konodai|First Battle of Kônodai]] in [[Musashi province|Musashi]].
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== Other Events of 1538==
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*The [[Ouchi clan|Ôuchi clan]] sends its first ''[[kango boeki|kangô bôeki]]'' (tally trade) mission to China since the [[1523]] [[Ningbo Incident]]. The three ships arrive two years later.
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*King [[Sho Sei (尚清)|Shô Sei]] sends a force to suppress resistance and further the conquest of [[Amami Oshima|Amami Ôshima]].
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===Births and Deaths===
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*[[Nabeshima Naoshige]], first daimyô of [[Arita han]], is born (d. [[1618]]).
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* 1538/10/7 [[Hojo Ujitsuna]] defeats [[Satomi Yoshitaka]] and [[Ashikaga Yoshiaki]] at the [[First Battle of Konodai]] in [[Musashi province|Musashi]].