Ich kopiere mal ein paar Gosho Interviews auf Englisch. Vllt hilft das ja weiter:
2006年朝日新聞夕刊のインタビュー記事より
From 2006 Asahi Evening Newspaper interview article
2006年1月13日(金)朝日新聞夕刊の記事「アニメ・原作いい刺激」
Friday January 13, 2006, Asahi Evening Newspaper article "Anime, Manga [are] good stimulus"
実はボスの名前は既に原作のどこかにでている。捜してみて下さい。…
In fact, the boss' name already appeared somewhere in the manga. Please see if you can find it. . . .
Another blog backs claim this up
2005年青山剛昌とコナンファンの集いでの質問コーナーより
From Q&A in a gathering between Aoyama Gosho and Conan fans in 2005
Q.黒の組織について?
Q. On the Black Syndicate/Organization?
A.正式名称はある。言うとボスの名前がバレちゃうので言えません。
A. A formal name exists. If mentioned, the boss' name will be exposed so I can't say.
Erm, I'll see if I can get a confirmation on this somewhere, when I have time . . .
『名探偵コナン&金田一少年の事件簿』4号より
From "Detective Conan & Kindaichi Case Files" 4th Issue
Q.これに気付いているor知っているのは自分だけ!!
Q. Only self noticed/knows about this!!
高山みなみ「「あのお方」が誰なのか…。キャストは誰も知らない。」
Takayama Minami: [I know] who "anokata" is . . . None of the [other] casts know.
This seems to be some interview with Minami, who, as you know, voices Conan in Japanese. I'll see if I can get a confirmation on this, too, but I don't have much time right now, ha ha.
EDIT: This Japanese website compiling info on Conan confirms that the Detective Conan & Kindaichi Case Files #4 did a special report on what the voice actors know that the general public don't. I guess I'll have to buy the issue to really see the full interview, hmm. /EDIT
So if the second source is to be trusted, Anokata's name popped up before sometime in 2005 - and since the first source is reliable, definitely by January 13 2006. The 2chan blog says this means the name popped up somewhere before File 551, but you guys can check that for yourselves.
Anyways, I think we can effectively rule out the "new character" possibility, yes?These show that the name of Anokata has appeared in the series.
Quelle: http://anokata.xxxxxxxx.jp/anokata.html
青山剛昌先生、講演会の質疑応答で「阿笠博士は黒の組織のボスじゃありません」って明言しちゃってたけど(汗) ……もしかしたら叙述トリックかもしれないよ(笑)
Aoyama Gosho-sensei declared definitively during the lecture's Q&A that "Professor Agasa isn't the Black Organization's boss," ha ha *sweats* . . . maybe this is a narrative trick? (laughs)
This tweet corroborates with what the 2chan board said about Gosho's favorite shows - maybe this is that one 2chan guy's source? I dunno.
講演会来場者との質疑応答のなかにあったんですが、青山剛昌先生も「あの花」の最終回は楽しみにして観ていらしたそうですよ! あと「花咲くいろは」も
This was included in the Q&A with the attendants - reportedly, Aoyama Gosho-sensi also enjoyed watching "Anohana"'s last episode! "Blossoming Iroha", too
Quelle: http://twitter.com/#!/AOKI_KC/status/84179949887569920
Aoki Keishis Profil: http://kenkyu-web.cin.nihon-u.ac.jp/Profiles/37/0003669/profile.html