Many MathWorks® products provide versions of the documentation translated from English to Japanese.
The new version of most products installs the translated documentation from the previous version and the English documentation for the current version. To view the English documentation, set the Help Language preference to English. To set Help preferences, access the Environment section on the Home tab, and click Preferences. Select MATLAB > Help.
The Language preference is available when the system locale is Japanese and the translated documentation is installed. The preference changes the language only in the Help browser and context-sensitive help. If the documentation for a product is not translated, the Help browser displays the English documentation.
When the translated documentation is available, you can view it by setting your Help Documentation Location preference to view documentation on the Web. Alternatively, download it from the MathWorks Web site at http://www.mathworks.co.jp/help.
For information about documentation in other languages, contact your MathWorks sales and service office.