Every year in March Kaetsu Educational Centre holds their Japan Day. This year will be my third year going, and since it's my last year in the UK, I really don't want to miss it. It's a nice little event to come and hang out at, and it's especially good if you're interested in Chado. As far as I know, Kaetsu Centre is the only place that teaches Tea Ceremony in our area.
You can see the program of events here, and the admission is free.
I know that some of my readers are from Cambridge, so don't miss this chance for a Japanese event in Cambridge :)