Package texlive-ptex

A TeX system for publishing in Japanese

http://tug.org/texlive/

PTeX adds features related to vertical writing, and deals with
other problems in typesetting Japanese. A set of additions to a
TEXMF tree, for use with PTeX, may be found in package PTeX-
texmf. PTeX is distributed as WEB change files.

General Commands
Command Description
mendex