Most of the actions depicted concern the desperate attempts by the Commonwealth forces to escape encirclement and capture, and to link up with the Chinese forces moving in from the Shan States, all the while conducting efforts to breakout to the north. In this short time frame most of the Japanese efforts involved setting up roadblocks or grabbing lightly defended, or undefended population centers and railway junctions. Within the timeframe in this AP there were some Japanese initiated skirmishes but such actions were, as yet, relatively uncommon. The reason for such uncharacteristic avoidance of aggressive action by the Japanese forces was due to the exhaustion and lack of supplies after the trek across the Thai frontier. The attacks up until the capture of the Salween bridge were non-stop and took the piss out of the invaders. They needed to catch their breath.
The very last scenario of this AP depicts an action along that advance after the battles around Rangoon had sorted themselves out and the retreat had begun in earnest.
If MMP ok's a 3rd Burma pack in this series, there will be considerably more harrying and assaults by Japanese forces intent on reaching the Indian Frontier and destroying the fleeing enemy instead of racing to see who gets to claim Rangoon first.
One of this AP's scenarios which has the Brits moving first is followed up by a formidable Japanese counterattack.