681 series
The 681 series is a dual-voltage electric multiple unit train type operated by West Japan Railway Company on limited express services in Japan.
Variants
681-0 series
Four six-car sets and five three-car sets are used on Thunderbird services. These trains feature Thunderbird branding. Also four six-car sets and four three-car sets were used on Hakutaka services. These trains featured "White Wing" logos.From February 2015, Hakutaka W sets began being repainted into the same livery as 683 series trainsets used on Shirasagi services, with thin blue and orange lines below the window band.