The Sakagura "Kouyou Fall Foiliage" Sake Tasting Event for October 27th still has some reservations available.
I've been to a whole bunch of these events over the past few years and enjoyed them a lot. Check out the link for info. Get in touch with them right away if ya want to go. They usually have 50 or more sakes to taste and they expanded the time from 2 to 2 1/2 hours. They will be also having a special fall festival menu. (This is not a press release. I am not affiliated with them in any way.)