Russia had its own Blitzkrieg-style doctrine, the name of which I can't remember. It wasn't as good as Blitzkrieg, but it was hardly trench warfare. Japan focused on manpower and manoeuvring over machinery, but they still didn't focus on trench warfare.
I want to add a little bit extra here where I may be useful. I'm no expert on the Red Army, but the IJA is an area I like to read up on.
At this point, the Russian army was using what is usually translated as "Deep Battle" and according to some historians/military theorists, it is in fact
better then Blitzkrieg. The focus on Russian strategy was on penetrating the front lines, and then plunging after and disrupting enemy reserves unorganized for combat, rather then simply enveloping his frontline troops. The First Gulf war is sometimes cited as an example of it, and the Manchurian Offensive was clearly the doctrine at it's finest.
As for the Japanese, they of course thought the Tank was an unreasonable weapon for them, for the obvious reasons of Japan's industrial capacity and where they were fighting. This said, Japan is still the first nation IIRC to employ an Armored Division in combat.
As for their infantry tactics, they were notably leagues ahead of Trench warfare, and in fact very much were influenced by concepts of Stormtrooper tactics. Japanese Soldiers were trained to be able to carry loads and travel quickly, even across broken terrain. In combat, they were told to move and fire, and use grenades and above all momentum and maneuverability to
avoid points of conflict, and have rear echelon troops deal with them later. The result was that in Japanese Army maneuvers, an advance of twenty miles a day was to be expected of non-motorized units.
Quite a bit indeed ahead of "Trench Warfare."
