Whether received as a gift or purchased on a return trip is not known.
It is professed (by a hand-written note) to have been made in Kyoyo by an artist named Jirobei, and that the box as well as blue cloth are marked with that name...see pics. The blue cloth must have anti-tarnish treatment, as the cup hasn't been polished, and is bright on the un-plated surfaces.
Almost 4" diameter; 1-1/2" high; 116.2gm; it appears to have a gold-plated interior with (partially) matte finish.
Beautifully made, and well balanced; a finger-thumb opposed grip at the rim results in a remarkably stable drinking vessel.
Note: the Manji Mon is left-handed, very unlike the right-handed German 3rd Reich symbol.
Sorry; it was necessary to 'squash' several of these pics.

