<i>machi-uke or uketsubo</i>, a metal cup like fixture at the bottom of the back side of a Japanese (samurai) chest armor (<i>dou</i>) for the end of a flag pole to sit in.
<a href="//commons.wikimedia.org/wiki/User:Samuraiantiqueworld" class="mw-redirect" title="User:Samuraiantiqueworld">Samuraiantiqueworld</a>
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<span class="int-own-work" lang="en">Own work</span>