韓国軽視論←韓国人の参加、大歓迎

the Great Empire of Japan 　 としているのはほとんど見たことがないですね。

「大」は国内用だとおもいます。

大日本帝国憲法は、

Constitution of the Empire of Japan
がほとんどです。

CONSTITUTION OF THE EMPIRE OF JAPAN, 1889

Imperial Oath Sworn in the Sanctuary in the Imperial Palace
(Tsuge-bumi)

We, the Successor to the prosperous Throne of Our
Predecessors, do humbly and solemnly swear to the Imperial
Founder of Our House and to Our other Imperial Ancestors that, in
pursuance of a great policy co-extensive with the Heavens and
with the Earth, We shall maintain and secure from decline the
ancient form of government.

以下のURLは上のものとは別です。

http://www.ndl.go.jp/site_nippon/kenseie/shiryou/simage/Gazou_6_1.html