This file is indexed.

/usr/share/doc/kakasi/copyright is in kakasi 2.3.6-1.

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The actual contents of the file can be viewed below.

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This package was debianized by Keita Maehara <maehara@debian.org> on
Thu,  7 Oct 1999 22:53:41 +0900.

It was downloaded from http://kakasi.namazu.org

Upstream Authors: 
 
 Originator:
  Hironobu Takahashi <hironobu@trc.rwcp.or.jp>
 Members of KAKASI Project (Maintainers):
  Hajime BABA <baba@kusastro.kyoto-u.ac.jp>
  NOKUBI Takatsugu <knok@daionet.gr.jp>
  Satoru Takabayashi <satoru-t@is.aist-nara.ac.jp>
  Ken-ichi Hirose <kenzo-@tama.or.jp>
  Ryuji Abe <raeva@t3.rim.or.jp>
  Yoshinori TAKESAKO <takesako@robotics.im.hiroshima-cu.ac.jp>

Copyright: 1992 - 2001 Hironobu Takahashi and Members of KAKASI Project

/*
 * KAKASI (Kanji Kana Simple inversion program)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either versions 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with KAKASI, see the file COPYING.  If not, write to the Free
 * Software Foundation Inc., 51 Franklin St, Fifth Floor, Boston,
 * MA 02110-1301, USA. 
 */

In Debian Systems, you can find a copy of the GPL license at:
/usr/share/common-licenses/GPL