Hercules
Count Of Durfisto
Japanese steel sucks, which is why there are so many folds in a Katana blade, to stengthen it, their armour is leather due to the way Samurai fight and they use no shields due to their style of fighting. For a long period in Japan the Yari (spear) was the weapon of choice for infantry.
The legions didn't use the Phalanx after 500BC and the legions of the Republic were split into Equites (cavalry), Velites (light infantry), Hastati (heavy infantry, young troops), Princeps (heaby infantry men in their prime) and Tiarii (veterans and the last line of defense) all heavy infantry apart from the Tiarii who uses spears would be equiped with pilum and Gladius.
As for chariots, they were not used by Romans in battle, mainly for recreation, chariots were really outmoded by cavalry.
The armies of the late republic/early empire were different again after the Marian reforms and the armies of the late empire different once more.
So you need to specify which Roman legionaries you are talking about, a Roman legion of the late republic/early empire would have ground a phalanx up and spit it out.