I dunno, I feel this would've been better if the weapons were more than just a collection of katanas, considering the variety of japanese weapons and their story. A kanabo would be a better fit for a weapon symbolizing sheer brute strength, since it's a large spiked truncheon often associated with imagery of oni IRL. A naginata would be better used as the weapon that can effortlessly cut through anything, imo: for a time naginatas were seen as an ideal weapon for women, as its reach would allow them to lessen any advantages in size, weight and strength an opponent might have, so the ability to allow even an unskilled wielder to inflict great wounds would be a good match. A shakujo, a type of ringed staff, would probably work better for both morality and spirituality, as it was a religious symbol for buddhism first and a weapon second. A weapon that seeks inconspicuousness would more than likely be an easily hidden knife; some type of weaponized tool such as a kama; a canesword or even a regular staff. I'd also consider a canesword for the weapon that grants improved sight, if only because of its link to Zatoichi.

That's just me and what I think, take it or leave it. I'd like to reserve Kashoku since Chromehound already called Yoken. I'll have a CS up tomorrow or on Thursday at the latest.