Taken from <a rel="nofollow" class="external free" href="http://www.asia.si.edu/collections/singleObject.cfm?ObjectId=25462">http://www.asia.si.edu/collections/singleObject.cfm?ObjectId=25462</a> - it's public domain in Japan, the country of origin
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Kohno Michisei</div>
Kohno Michisei