That's not proof. You think the Japanese didn't breed their warhorses for strength and speed?
Wrong again, by the time the knights to the English lines they have long since been dismounted.
The real reason the barding could not deflect the arrows was that the barding's top portion was very weak and the longbows were fired in an arc, which easilly penetrated the weak top armor. But apparently you didn't know that.
Wrong again. Proofed armor didn't work in Europe and it won't work in Japan. You cannot proof the whole armor and you can forget about armoring the horse against guns. Once his horse was shot down, a gendarmes was just a tin can on foot wearing 80 lbs of armor waiting to die. There is a reason everyone in Europe abandoned the full body plate of the early cuirassiers in favor of just a small chest plate and unarmored legs the later ones wore.
17th century Japan also had the best guns in the world at the time, and in their own wars guns easilly slaughted armored cavalry.
Completely false. The longbow was actually a very primitive weapon. The laminated bows the Asian countries used were far superior and resembles modern composite bows. They had less draw weight for more power, you didn't need the arms of a gorilla to draw one.
Like I said earlier, if you're going to be anal retentive about historical accuracy in a game where Ghandi allied with Bismarck to fight in the blitzkrieg of 1320 against Washington, you should at least get your damn facts straight.