Japanese Stamps Digital Museum

帝国議事堂竣工記念 << 1936年(昭和11年) 11月7日 >>  みほん 2-3-10

Memorial day for the completion of the Imperial Diet Building - Specimen -
Issued on November 7, 1936 (Showa 11)

Memorial day for the completion of the Imperial Diet Building - Specimen -
Issued on November 7, 1936 (Showa 11)
The Imperial Diet Building was completed in November 1936 (Showa 11) over nine years from the start of construction in 1927 (Showa 2). The exterior is made of granite and the interior is made of marble. All building materials are almost made in Japan, and building area is 12,300㎡.

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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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