Scarcity Scale
1 dot is common. 5 is extremely rare.
Emperor Hirohito (the Showa Emperor) actually ascended to the throne upon the death of his
father in 1926. The enthronement ceremonies, though, were held in 1928.

This medal commemorates that event, and it was freely issued to people throughout the country
who participated in the celebration ceremonies.

Peterson notes that some medals were struck in sharper relief, and this is indeed true. The
small gold mum crest is an attached piece. See the award document related to this medal
HERE.

OBVERSE: Imperial throne. 'Banzai' written below. Cherry and orange blossoms comprise the
surrounding ring.
REVERSE: Cloud shapes. Inscribed 'Showa 3 [1928] November, Enthronement Commemorative
Medal.'

Peterson writes that the ribbon was 'designed from the drapes of the enthronement pavilion.'

This medal was also issued in a women's version (see below).
The presentation case is pressed cardboard.
Peterson mentions that it is purple, but  actually a number of hues can be found.
Women's version. The medal is the same, but the ribbon style is different.
Showa Enthronement
Commemorative Medal
大礼記念章 (1928)
Ribbon bar
LEFT: Women's medal
RIGHT: Men's medal
LEFT: Women's medal
RIGHT: Men's medal
The miniature of this medal reproduces the full-sized faithfully.
While the larger medal is common, the miniature is very rare.
Included is the fairly scarce paper wrap that indicates this was
made in March, 1930 by the Japan Mint. This is a fairly late date for
the minting of this medal. 'M' hallmark.
The 1928 Showa Emperor Enthronement Commemorative Medal.
What is significant about this example is the paper wrap and
hallmark. The wrap shows that this was made in January 1929
by the Japan Medal Making Corporation, not by the Japan Mint.
The hallmark 'N' matches this, since 'Japan' in Japanese is
'Nippon.' So we can finally identify one of the hallmarks with this
example.
The wrap shows that this was made in February 1929 by
Yamasaki Shoten, not by the Japan Mint. The hallmark 'Y'
matches this, since that is the first letter of 'Yamasaki.' So we
can identify another one of the hallmarks with this example.
1928 Showa Emperor Enthronement Commemorative Medal award certificate.
Given to Army Cavalryman Colonel Imai Yoshihito on November 16, 1928.
The wrap shows that this was made in February 1929 by Shobido Corporation, not by the
Japan Mint. This company, located in Osaka near the Japan Mint, has been in operation
since 1900. Click on the link above to see its current website.

There is no hallmark on the knob, but there is an 'S' hallmark on the attachment ring.
Women's miniature medal.
The miniature is very rare.
Enamel and bronze watch fob.
Inscribed 'Showa 3 [1928], Showa Emperor Enthronement Celebration Parade
Commemorative, Tokyo Municipal Office.'

The Tokyo City emblem is below the bird's left foot. The bird itself is a phoenix, or
hou-ou in Japanese. An imperial symbol.
1928 Showa Emperor Enthronement bronze medal. Dated Showa 3 [1928] November 10.
Hallmarked by the Japanese Mint, so this is an official government issue. Also inscribed National Printing Bureau.

Diameter around 4 cm, so it is a bit smaller than the regular table medals.
Enamel and bronze watch fob.
Inscribed 'Showa 3 [1928], Showa Emperor Enthronement
Celebration Recital Commemorative, Tokyo Municipal Office.'