As promised here are the greens for the banner tops, which will be included with the standard-bearer sets. First up is the Japanese one. It is three-sided and shows the symbol of the royal family, a chrysanthemum blossom, on each side.
This will be included two times in the standard-bearer set as all the Japanese standards used this top. (I guess that's due to fact that the 'new' Imperial Japanese army had just been established in the decades before the Russo-Japanese War.)
The Russians on the other hand used a multitude of different standard tops. Therefore the Russian standard-bearer set will include two different variants (one of each), of what seems to be two of the most widely-used ones.
The first top, similar to the Japanese one, is in form of the symbol of the Romanow dynasty the double-headed eagle.