User blog comment:Krauserlols/Wuju: a deeper art than most people think/@comment-5038450-20131002072514/@comment-31656015-20131002095811

The word "wuju" or rather it's exact term "wuji"

"wu" meaning Nothingness, while the character "ji" is for utmost/ extreme, and most texts use the word "wuji" to signify limitless / extremeless.

I'd say wuju style is mostly similar to mushin or "the state of no mind"  which is a state of mind that   is not occupied by thought or emotion allowing it to be open to anything which allows you to react to anything without hesitation acting completely on their natural reactions allowing the execution of flawless combat techniques.

this is further reinforced by parts of his lore.

"He descended from one of the few tribes dedicated to the preservation of Wuju, a martial art founded with the principles of absolute spiritual awareness of one's self and one's enemy"

"The edge of the sharpest blade is no match for the calm of the peaceful mind."

^ both of these are most likely based off the state of mushin.

Some forms of combat are not reliant of the practitioner's weapon, rather what his mind and body perceives.

And if you'd read his lore you'd understand that the other practitioners wuju were killed during noxus's invasion of ionia. which would most likely relate to 10~20 years ago at most.