/usr/share/doc/sl/README.jp is in sl 3.03-16.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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SL: $B%-!<%?%$%W6:@5%=%U%H(B
Copyright 1993,1998 Toyoda Masashi
(toyoda@is.titech.ac.jp)
===========================================
$B$`$+$7$K$bEj9F$5$l$?>iCL%=%U%H$N(B sl $B$N9k2ZHG$G$9!#(B
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