chasen [options] file


chasen is a morphological analysis system. It can segment and tokenize Japanese text string, and can output with many additional information (pronunciation, semantic information, and others).

It will print the result of such an operation to the standard output, so that it can be either written to a file or further processed.



Use partial sentence mode for analysis.


Use Japanese sentence mode for analysis. KUTEN (including other puncuation marks) and empty line are treated as the punctuation of the text.


Use the command mode for analysis.


Show the best path. (default)


Show all morphemes where ambiguity is identified in the best path.


Show all paths expanding for all combinations of the ambiguity.


Show formatted morpheme data in column (default)


Show entire morpheme data.


Show coded morpheme data.


Show detailed morpheme for use by Prolog.


Show detailed morpheme for use by VisualMorphs.


Show morpheme as compound words or their segments.

-F format

Show morpheme formatted by the format such as "%m\t%y\t%M\t%U(%P-)\t%T \t%F \n" .


Print help information for -F option.

-i lang

Specify the character encoding of the input file. e: EUC-JP, s:Shift JIS, w:UTF-8, u:UTF-8, a:ISO-8859-1

-o file

Specify the output file to be file .

-w width

Specify the cost width.

-r rcfile

Use rcfile as the chasenrc file.


Use the system default chasenrc file (/etc/chasenrc).

-L lang

Specify language.


Print the list of parts of speech (hinshi).


Print list of conjugation types.


Print list of conjugation forms.


Print help.


Print ChaSen version number.

This manual page was written for the Debian GNU/Linux distribution because the original program does not have a manual page.

RELATED TO chasen…

The programs are documented fully by /usr/share/doc/chasen/manual\(hyj.tex or /usr/share/doc/chasen/manual\(hyj.pdf.


This manual page was written by Takao KAWAMURA <[email protected]> and modified by Hideki Yamane <[email protected]> and Osamu Aoki <[email protected]> for the Debian GNU/Linux system (but may be used by others).