Hello! I missed the memo from Johnny's Web so I arrived at JFC Shibuya to this:
It says that the office is moving (they moved on 22 Oct) so they will be temporarily closing up the FC information counter and the exhibition space. They'll let us know when they're coming back once they finalise things.
For any queries, fans may dial 0570-033-366, and snail mail or fan letters can be sent to 〒150-8550 東京都渋谷区渋谷3-29-24 MTBビル4F ジャニーズファミリークラブ with the recipient listed as 「〇〇ファンクラブ係」(Fanclub representative) or 「〇〇タレント名」 (name of artiste).
So, if you're coming to Tokyo soon, don't be like me and make the trip down only to find the JFC closed! ^^;;