This is pTeX, TeX system with Japanese support.

This system is based on TeX 3.14159.

pTeX supports JIS, EUC and Shift-JIS.  This package installs only the
character code independent files of pTeX, so you need to install
either ptex-jis, ptex-euc or ptex-sjis besides this one.

- Max

WWW: http://www.ascii.co.jp/pb/ptex/

See also
    http://www.matsusaka-u.ac.jp/~okumura/texfaq/