Kaiyo, or "ocean" whisky, is a Japanese whisky made from 100% malted barley, sourced from more than one distillery in Japan, hence a blended malt, and not a single malt. All Kaiyo whisky spends at least 3 months maturing at sea in Japanese Mizunara Oak casks. Tasted this at a Saratoga Whiskey Club Japanese dinner at Hamlet & Ghost. This is a non-age-statement whisky comprised primarily of 8-to-10-year old whiskies.