The do not miss event for any sake aficionado, The Sake Fair, will be held on June 15th in Ikebukuro. A rare opportunity to try up to 450 nihonshu (impossible, but nice to dream about) at one time. And all for the bargain price of 3,500 JPY (3,000 JPY if you purchase ahead of time). Best of all, representatives from the breweries are on hand to answer questions about their products.
The English link for the event follows:
Food Sake Tokyo 