For a value, contact mctears.com or bonhams.com However, I was able to find out that this Suntory blended whisky "Reserve" you have is basically 12 years - although you don't see it on the label. The key malt is white oak from another malt distillery "Hakushu" and the character is gorgeous smell and creamy taste. Is it safe to drink? Likely it's fine, but how it has been stored plays a factor as well as realizing that over time, air eventually seeps in and can alter the taste and color. If you decide to drink it, nose it and go from there. And, as they say in Japanese, Kampai!
Keep us posted!