Japanese Stamps Digital Museum

阿蘇国立公園(第1次) << 1939年(昭和14年) 8月15日 >>  みほん 3-1-6

Mt, Aso National Park Stamp Issued August 15, 1939 (Showa 14) - Specimen -

Mt, Aso National Park Stamp Issued August 15, 1939 (Showa 14) - Specimen -
Aso National Park is a mountain park centered on Mt. Aso in Kumamoto Prefecture, Kyushu. Four types of stamps were issued, including a distant view of Mt. Aso and a crater.At the same time, a small sheet with a commentary was released, but since 1937 (Showa 12), Japan was in a state of war due to the Sino-Japanese War, and due to a shortage of Tato (cover) paper, only 60,000 sheets were issued.

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The above is only true for specimen stamps.
For more information and official printed stamps, see this.
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