http://swissnet.ai.mit.edu/~jaffer/jfilter/index.html
((jfilter . "/usr/local/lib/slib/jfilter/jfilter"))
Usage: jfilt input-file output-file jcode Converts Japanese text in INPUT-FILE to format JCODE and writes result to OUTPUT-FILE. JCODE can be jis, eucj, or sjis.
Usage: jtype input-file [c-length] Categorizes the Japanese coding system used in INPUT-FILE. JTYPE prints jis, eucj, or sjis, bin, or ascii. If optional C-LENGTH argument is given, up to C-LENGTH characters are checked (default is 5000).