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CHASEN(1) General Commands Manual CHASEN(1)


chasen ‐ Japanese Morphological Analysis System


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.
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.
Specify the character encoding of the input file. e: EUC-JP, s:Shift JIS, w:UTF-8, u:UTF-8, a:ISO-8859-1
Specify the output file to be file .
Specify the cost width.
Use rcfile as the chasenrc file.
Use the system default chasenrc file (/etc/chasenrc).
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.


The programs are documented fully by /usr/share/doc/chasen/manual‐j.tex or /usr/share/doc/chasen/manual‐j.pdf.


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