ACK is a highly versatile Kanji code converter. ACK can do reciprocal conversion among Japanese EUC, Shift-JIS and 7bit JIS. JIS Kata-kana(SJIS Han-kaku Kana) is also supported. Kanji code can be automatically detected even if the input stream contains Kata-kana characters. Besides, ACK can be used as a Kanji code checker with very high detection rate.