While its incorrect to say Japanese infantry were poor in tactics (their volley rotation, linear formation, and hayago equipped arquebuses were all ahead of their time), its still doubtful that it would have survived the Polish Hussars. Japanese infantry were almost outflanked in the Battle of Jiksan by the Ming cavalry and the Korean arquebusiers modeled on Japan all had problems against Manchu cataphracts. The Polish Hussars were as heavily armed as the heavy Manchu cavalry, probably had even bigger horses and would have little trouble breaking an infantry formation even if it was much bigger in number.The Japanese would have poured volley fire into the hussars. Nobunaga knew how to deal with cavalry.
You're entitled to your opinion, based as it is on ignorance.