Excellent Imperial Event cup with three swords, and Army
star and two comma-shaped figures that are probably the

tomoe kamon
, a crest usually used for religious
significance.  Inscribed on the reverse 'Taisho 4 [1915]
November, Imperial Event Commemorative'. This could
refer to some Taisho Emperor Enthronement events,
which were usually held a couple of years after the actual
enthronement.
Taisho Emperor Enthronement
Lacquered wood cup with gold gilt Imperial Paulonia Leaves
and a badge inscribed 'Imperial Event Commemorative'. On
the reverse: 'Taisho 4 [1915].'
Beautiful Taisho Emperor enthronement commemorative plate. Imperial kiri crests
and Ho-o birds.

Inscribed 'Commemorative' and on the reverse 'Taisho 4 [1916] November 16th.'
Interesting square, flag-shaped cup. Note the far right has the flagstaff
painted and a gold filial in the corner.
The reverse has painted blossoms.

Inscribed 'Taisho Coronation Commemorative.' This emperor's
coronation was in 1915.
The Taisho Emperor ascended to the throne upon the death of his father in 1912. However, the
official enthronement ceremonies were not held until 1915. In this year, all across the nation official
ceremonies and parties were held, and people who attended often got sake cups as a
commemorative. I suspect a donation was also involved, but that is just speculation.

The designs varied from place to place; i.e., there was no set design. However, the most common
designs incorporated one of the two main imperial crests (the mum and the paulonia leaves). The
Imperial Ho-o bird appears often, too.

There are two phrases that positively identify a cup as an Enthronement item. First is the phrase
taiten, which means 'Imperial event.' This phrase was also used for the Taisho Emperor's
enthronement and for other Imperial events, so this second inscription is necessary:
Taisho 4 [1915].