Ohishi Tokubetsu Reserve Whisky 750 MLThis whisky is a very special release of almost equal parts 27 year old (29%), 10 year old (35%), and 7 year old (36%) Ohishi Whisky Sherry Casks. While the older whisky provides depth and structure, the 7 and 10 year old whiskies give zest and complexity to the final product. 40. 5% ABV. rom the Kumamoto Prefecture on the island of Kyushu in Japan, the Ohishi Sherry Cask is a whisky distilled from rice and aged in first and second fill sherry casks.