Help:Installing Japanese character sets

Windows Vista, Windows 7, Windows 8, Windows 8.1 and Windows 10 include native OS support for displaying Japanese text by default. To input Japanese on a non-Japanese version of the OS, however, the Japanese input method editor must be enabled from the Region and Language (Windows 7 and 8) or Regional and Language Options (Vista) section of the Control Panel.

A Windows XP CD-ROM is needed to install support for East Asian languages. (Non-East Asian versions of Windows only, as East Asian versions have native Japanese support.)

Your system should offer to download Asian fonts by default while viewing pages in those languages, provided that you are using Internet Explorer.

Otherwise, update your system manually with the language support packs.

By default, all necessary fonts and software are installed in Mac OS X v10.2 (2002) or later.

Installing the ttf-takao-mincho package will add support for displaying Japanese text in Debian or Ubuntu. You can do this with one of the following commands:

More fonts can be installed with this command:

As of Fedora Core 4, you need fonts-chinese fonts-japanese

Install a Japanese font package, for example one of these:

You need a Japanese font package, for example one of these:

By default, the Japanese fonts are installed during the DVD standard install.

If additional Japanese fonts or Japanese language input is needed, the installation of additional packages is required.

In order to install those packages, follow the step-by-step instructions below:

Once the installation is performed a reboot is required in order to use the new language settings. This method is also valid to install support for any other language.

With X.Org 7.x and above, install the package x11-fonts/font-jis-misc:

Please note that the package version may be different. Alternatively, this can be easily accomplished by installing from the ports tree:

Most modern operating systems use Unicode to display Japanese characters. Many fonts have been developed to display Japanese Unicode characters, and many of them are available for downloading over the Internet.

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Wikipedia