Heavy infantry does not count as special forces. Yes, there were ashigaru and other peasants that were armed, and i'm honored to see that you classify samurai as special forces, because their skill was astonishing and far far superior to anyone with swords, but tacticly, you couldn't use them as any kind of spec ops, they were the punchline in frontal combat, they used naginatas, were trained, and inflicted a heavy loss in enemy ranks.