Finally got enough figures painted to get a game played with my friends Bill (Japanese) and Dave (Russian).
The scenario involved a Japanese attempt to drive the Russians out of defensive positions to secure passage through a pass. Roughly equal forces numerically but with the Japanese having the qualitative advantage.

Japanese naval infantry disembark to join the attack.

and marches towards the sound of firing.

The Russian view.

The Japanese assault begins

Japanese skirmish line

Russian defenders

Cavalry and sailors combine to destroy a Russian infantry unit

Cossacks appear in the Japanese rear
In the end the Japanese force was not strong enough to oust the Russians from their positions and the appearance of Cossacks in their rear put an end to the attack. As the Japanese are nearly always going to be the attackers, I think they need some more support both artillery and machine guns.