JLK 1.0: Overseas Power Macintosh Compatibility

This article describes an issue with the Japan Power Macintosh and Japanese/Chinese Language Kit (version 1.0) installer. This does not affect U.S. Power Macintosh computers running version 1.0 of the Japanese/Chinese Language Kits. The Power Macintosh and the Japanese/Chinese Language kits version 1.0 are compatible in the U.S.
Version 1.0 of the Japanese Language Kit installer will replace the NuScript manager with an older version. Version 1.1 of JLK/CLK is available internationally to fix this problem. This issue does not affect the systems used in the United States in any way.

The following article can help you locate the software update mentioned here:
Published Date: Feb 20, 2012