Japan '45 question about casualty rates

[beldurax]

I am playing through the scenario on Tanegashima and am noticing the casualty rates (per turn) from attacks, from either side, to be quite low.  Artillery casualty rates seem fine, but anything else seem to usually average 1-2 men per attack.  I am still fairly new to the JT engine, so go easy on me :)
Thanks, Travis