In addition to the medals made at the Japan Mint, there is a large variety of
privately-made medals, awards, commemorations, etc. These are usually
large and heavy but some are smaller pieces.
Here are a few examples.
Inscribed 'Domestic Product Excellence Award. Emperor
Enthronement Commemorative. Promotion of Domestic
Products, Tokyo Exhibition. Showa 3  May.'
A larger medal, but it is rather light. Gold colored aluminum?
Inscribed 'Award. 7th National Domestic Product Exhibition.
Taisho 2  May. Held at [Odo?]'
Inscribed 'Award. 10th National Domestic Product Exhibition.
Taisho 3  November. Held at Nara.'
Inscribed 'Award. Opening of the San'in Railroad Commemorative. National
Domestic Product Exhibition.
Meiji 45  June.'
The medal itself has no inscriptions, but the interior lid shows this was a
3rd place medal for a middle school sumo tournament.
Dated Aug 10, 1969.
Inscribed 'Award. Kyoto. National 5-2 Goods Exhibition.
Meiji 40 .' The '5/2 Association' promoted
domestic agricultural goods.
Inscribed '2nd National Fruit Goods Exhibition. Meiji 35 .'
The figure on the obverse appears to be the mythical Emperor Jimmu.