Romanization is the attempted for non native speakers to use there native tongue to figure out foreign words. As well as there are several romanization methods.
JUTSU and JITSU have been the accepted romanji for the same kanji (in this case "Technique") But that doesn't mean the JITSU can't be used for another kanji. (KI is used for at least five kanji I can think of off the top of my head) In English we have stair and stare that sound the same but mean two different things. In Japanese if you were to right it in katakana it would be the same thing becaue of the way they sound.
LeTerian Bradley
There are no excuses on the mat, in the cage, or on the battlefeild! Train wisely!