@bagoes Yes, that was the one. For anyone interested, the English volume added an extra comic to the end reusing previous panels explaining that the solution was slightly different in the original version because it required the functions of a Japanese keyboard. I personally don't have any experience with Japanese keyboards and they might function differently now but this is how the explanation for how they worked in 1993.
Keyboards in Japan can type in 3 different modes: Hiragana, Katakana, and Romanji. That would mean that you could type hitting the same keys but get different words depending on which mode it was in similar to how hitting the shift key changes our numbers keys into symbols. In the mystery, it says that the first clue was 'no chi' written in either Hiragana or Katakana (they only show the roman in the English version even in the explanation) which on the keyboard in Romanji mode would be 'K' on the 'No' key and 'A' on the 'Chi' key making it write out as 'Ka'. So taking that process for all of the words would change the words into the message the leader of the club was trying to convey.
Since English keyboards only have one letter per key, that explanation doesn't work so they just had her make a cryptogram that needed to be put through a word processor and that some use of capitalization would cause it to have different effects on the code making out the message.