I used Nikka Whiskey, which has a fruity nose and a smoky finish, and apple vermouth. Over all interesting but I wouldn't recommend. Maybe the other versions would work better.
I used the Japanese Hibiki Harmony, which has distant fruity and citrus notes. Strongly recommend twisting thick grapefruit zest. Love it, this is a shiny newcomer.
The Japanese whiskey (I used Suntory) and large proportion of bianco vermouth set this apart from other whiskey drinks. No grapefruit zest so I used orange. Highly recommended.