AKB48公式サイトのドメインが co.jp な件

http://www.akb48.co.jp/

jp とか com でなく co.jp ってなんか意外。

whois はこんな感じ。

# whois -h whois.jp akb48.co.jp
[Querying whois.jp]
[whois.jp]
[ JPRS database provides information on network administration. Its use is ]
[ restricted to network administration purposes. For further information, ]
[ use 'whois -h whois.jprs.jp help'. To suppress Japanese output, add'/e' ]
[ at the end of command, e.g. 'whois -h whois.jprs.jp xxx/e'. ]

Domain Information: [ドメイン情報]
a. [ドメイン名] AKB48.CO.JP
e. [そしきめい] かぶしきかいしゃおふぃすふぉーてぃえいと
f. [組織名] 株式会社オフィスフォーティエイト
g. [Organization] office 48 Inc.
k. [組織種別] 株式会社
l. [Organization Type] corporation
m. [登録担当者] KS15050JP
n. [技術連絡担当者] TA7565JP
p. [ネームサーバ] rdns1.ups.ne.jp
p. [ネームサーバ] dns-sec.ups.ne.jp
[状態] Connected (2011/04/30)
[登録年月日] 2006/04/24
[接続年月日] 2006/04/24
[最終更新] 2010/05/01 01:42:42 (JST)

# whois -h whois.jp akb48.co.jp/e
[Querying whois.jp]
[whois.jp]
[ JPRS database provides information on network administration. Its use is ]
[ restricted to network administration purposes. For further information, ]
[ use 'whois -h whois.jprs.jp help'. To suppress Japanese output, add'/e' ]
[ at the end of command, e.g. 'whois -h whois.jprs.jp xxx/e'. ]

Domain Information:
a. [Domain Name] AKB48.CO.JP
g. [Organization] office 48 Inc.
l. [Organization Type] corporation
m. [Administrative Contact] KS15050JP
n. [Technical Contact] TA7565JP
p. [Name Server] rdns1.ups.ne.jp
p. [Name Server] dns-sec.ups.ne.jp
[State] Connected (2011/04/30)
[Registered Date] 2006/04/24
[Connected Date] 2006/04/24
[Last Update] 2010/05/01 01:42:42 (JST)