DataCard SD260 Installation And User Manual page 114

From a PC running a Japanese edition of a supported Windows operating system
Japanese-language characters are also supported. They include the following
special characters:
45 Katakana characters:
and the following 10 Katakana characters:
Each time you start using Japanese-language characters, or stop using them, a
hidden character is added. Each hidden character reduces the number of
characters you can encode by one character.
104 Card Design and Setup