"Sword edges could not penetrate even relatively thin plate (as little as 1 mm). Also, although arrows shot from bows, crossbows and early firearms could occasionally pierce plate especially at close range, later improvements in the steel forging techniques and armour design made even this line of attack increasingly difficult. By its apex, hardened steel plate was almost impregnable on the battlefield. Knights were instead increasingly felled by polearms such as the halberd and blunt weapons such as maces or war hammers that could send concussive force through the plate armour resulting in injuries such as broken bones, organ haemorrhage and/or head trauma. Another tactic was to attempt to strike through the gaps between the armour pieces, using daggers, spears and spear points to attack the man-at-arms' eyes or joints."
"Contrary to common misconceptions, a well-made suit of medieval 'battle' armour (as opposed to the primarily ceremonial 'parade' and 'tournament' armour popular with kings and nobility of later years) hindered its wearer no more than the equipment carried by soldiers today. It should be remembered that an armoured knight would be trained to wear armour from his teens, and would likely develop the technique and endurance needed to comfortably run, crawl, climb ladders, as well as mount and dismount his horse without recourse to a crane (a myth probably originating from an English music hall comedy of the 1830s, and popularised in Mark Twain's A Connecticut Yankee in King Arthur's Court). A full suit of medieval plate is thought to have weighed little more than 60 lb (27 kg) on average, considerably lighter than the equipment often carried by the elite of today's armies. (For example, SAS patrols have been known to carry equipment weighing well over 200 lb (91 kg) for many miles"
as i already quoted in the other thread.
and upper-class Japanese warriors (bushi or samurai) never used a shield since both hands were needed for the bow, spear or sword.
and from your very own source
"The highly developed weight distribution that became possible with the era of Articulated Plate was simply amazing. A warrior clad in a suit of properly made Articulated Plate would have been able to do cartwheels in his armour. Each plate balanced perfectly to a part of his body. This effectively dispels the myth of knights in armour falling off their horses and not being able to stand up. Such stories must have developed from certain examples of Tournament Plate Armour. Tournament Plate was specially designed to take the incredible impacts of jousting, so that it was very, very heavy."
also i cannot find your quote about japanese vs european mail
*edit k i found it but also this which followed it- "Of course, it's not really fair to compare Europe to Japan, as the fighting styles of each evolved on completely different tangents. European armour needed to be heavier to deal with the bigger, crushing weapons common in their battles, even if heat exhaustion from the thicker, less breathable armour was common. Japanese combat techniques used lighter, faster weapons and thusly mobility was more of a concern."
but we arent discusing chain mail we are discussing plate armour and its superiority to japanese samurai armour.
now look at this, look at the many gaps in the japanese armour compared to the european armour