Japanese Stamps Digital Museum

富士鹿切手 (改色・旧版) << 1922年(大正11年) / 1929年(昭和4年) >>  みほん 1-5-1

Fuji and Deer stamps 1 Issued on 1922(Taisyo11) / 1929(Syowa4) - Specimen -

Fuji and Deer stamps 1 Issued on 1922 (Taisho 11) / 1929 (Showa 4) - Specimen - In 1922 (Taisho 11), the Ministry of Communications issued three types of stamps designed for Mt. Fuji and deer in response to the increase in foreign mail prices by UPU. 4 sen for printed matter (yellowish green), 8 sen for postcards (red), 20 sen for letters (blue). Then, in 1929, a color-changing stamp with the UPU-designated printing color was 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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