Is Fujitora based on Zatoichi?

The blind samurai you're referring to is Zatoichi, and the blind Admiral in One Piece is named Issho, aka Fujitora. And yes, as revealed in SBS Volume 74, Fujitora was inspired by Zatoichi, and particularly his portrayal by Japanese actor Shintaro Katsu.

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Keeping this in consideration, was there ever a blind swordsman?

Toda Seigen (?? ??, 1519?- ca. 1590s?) a renowned swordsman during the Sengoku Period in 16th century Japan. After he became completely blind, Seigen's lord was wondering if he had actually succeeded, so he ordered a sparring with a disciple of Shint?-ry? called Umezu, fighting with a staff over 3 feet. Also, what do you use ice picks for? An ice pick is a tool used to break up, pick at, or chip at ice. In shape it resembles a scratch awl for wood. Before modern refrigerators, ice picks were a ubiquitous household tool used for separating and shaping the blocks of ice used in iceboxes.

How hard is it to stab someone with a sword?

You only need about 3 inches of penetration to kill someone if you aim for the torso and hit something important. A pointy sword is rather heavy compared to a knife or machete, and backed by the large muscles in one's shoulders, arms, and torso, it's easy to achieve that level of penetration. Accordingly, is half swording real? Half-sword, in 14th- to 16th-century fencing with longswords, refers to the technique of gripping the central part of the sword blade with the left hand in order to execute more forceful thrusts against armoured and unarmoured opponents.

Is it possible to deflect an arrow with a sword?

Any sword, even a modern fencing foil, could conceivably deflect an arrow...IF you managed to hit the thing in the right place at the right time. What do you call making a sword? Bladesmithing is the art of making knives, swords, daggers and other blades using a forge, hammer, anvil, and other smithing tools. Bladesmiths employ a variety of metalworking techniques similar to those used by blacksmiths, as well as woodworking for knife and sword handles, and often leatherworking for sheaths.