The Yamazaki Limited Edition 2015 is composed of three single malts: A single malt aged 20 years in sherry casks made out of European oak ; these barrels were used for maturating red wines. Another single malt aged 20 years in port wine casks made out of European oak ; these barrels were previously used for maturing port wines. A young single malt aged in bourbon barrels made out of American white oak. Bottled at 43 % above volume