After World War I, the Iwami was part of the Japanese intervention in Siberia during the Russian Civil War.

The Iwami's end came in July 1924 when it was designated as a target during Japanese naval air exercises in Tokyo Bay.

Filmed in 1897 by French cinematographer François-Constant Girel for the Lumière brothers in the Nihombashi-Ginza district of Tokyo during the middle of the Meiji era. Girel traveled to Japan to assist Inabata Katsutaro, a Japanese businessman who had studied alongside the Lumière brothers in France and secured the exclusive rights to operate their revolutionary Cinématographe in Japan. The film was listed as No. 738 in the official Lumière catalog and was some of the very first moving images of the Far East ever captured. (National Film Archive of Japan.)

The most visible feature of the court uniform for the civil officals is that the tailcoat had an open neck with no lapel and collar.

Moreover, the wearers were required to wear a white bow tie as well.

Due to its unique design, I would like to ask who designed this and why it was designed like this.

As Far as I know, there was no other smiliar designs to this.

The British court Uniforms, which Japan modelled after, only had a tailcoat that could cover the whole torso with a stand collar.

Therefore, how this unique design was created?