There's actually 3 kinds of Japanese letters, Kanji is actually even technically Chinese (as in, the Japanese were already speaking Japanese without a written language, Chinese came over with basically a character for everything, so instead of spelling 'd-o-g' or 'i-nu' you'd just write the Kanji for dog). The other two alphabets they have (hiragana and katakana) are phonetically based, so i is always い if you're using hiragana or イ for katakana rather than being different for different words. I'd guess that 'Jesus' and 'Fags' are written using katakana, it's used for sound effects and foreign words (tries to imitate them phonetically), throughout the thread I saw that kanji, hiragana, and katakana were all used, even if I probably couldn't translate any of the sentences (I'm not too great with kanji...)