KatsuNinken vs. KatsuJinken
 

Hi,

I need the exact translation of Katsuninken and Katsujinken, preferably by a native Japanese speaker. Please do not write your speculation. Only respond if you're certain about the difference.

Thanks,
Hunter

katsujinken ・ katsuninken 【活人剣】
–common noun
life-saving sword (a killing sword may be a sword of life depending on how it is used)

long sword - Words - Tangorin.com Japanese Dictionary

My question is whether these two words are exactly the same? Then why do they have different phonemes?

Hunter

For the same reason "日本" is both "にほん" and "にっぽん" ;)
Or how "nuclear" can be pronounced "nucular" and mean the same thing. JFK did it, Carter did it, Bush 2 did it. Heck, I think Clinton may have, too!

Yes, they are exactly the same.

My question is whether "neither" (neether) and "neither" (nyether) are exactly the same? Then why do they have different phonemes?

Because Japanese kanji　has different readings.
活人剣＝"Katsu　Nin　ken"　or "Katsu　Jin　ken"
Nin is Go-on for "人".Go-on - Wikipedia, the free encyclopedia
Jin is Kan-on for"人".Kan-on - Wikipedia, the free encyclopedia
Go-on readings are used particularly often in Buddhist terms.
活人剣 is originally from Kōan Kōan - Wikipedia, the free encyclopedia
Katsu　Nin　ken is correct phoneme from historical viewpoint.
But most of modern japanese,I think, pronounce 活人剣 as Katsu Jin ken at first sight and it is not wrong.

Dude, you just blew my mind.