JPUG wants to have a copyright notice on the translated doc

JPUG (Japan PostgreSQL Users Group) would like to add a copyright
ntice to the Japanese translated docs.

http://www.postgresql.jp/document/9.5/html/

Currently "Copyright 1996-2016 The PostgreSQL Global Development
Group" is showed on the translated doc (of course in Japanese). What
JPUG is wanting is, adding something like "Copyright 2016 Japan
PostgreSQL Users Group" to this.

The reason for this is, "Copyright 1996-2016 The PostgreSQL Global
Development Group" may not be effective from the point of Japan laws
because "The PostgreSQL Global Development Group" is not a valid
entity to be copyright holder according to Japan's laws. To prevent
from abuses of the translated docs, JPUG thinks that JPUG needs to add
the copyright notice by JPUG to the Japanese translated docs (note
that JPUG is a registered non profit organization and can be a
copyright holder).

Opinions?

Best regards,
--
Tatsuo Ishii
SRA OSS, Inc. Japan
English: http://www.sraoss.co.jp/index_en.php
Japanese:http://www.sraoss.co.jp