The Kagayaki(かがやき?, "glitter" or "luster") was a limited express train service operated by West Japan Railway Company (JR West) in Japan from March 1988 until March 1997. The name is scheduled to be used for Hokuriku Shinkansen train services from March 2015.
From their introduction in March 1988, services were normally formed of 4-car 485 series dual-voltage (AC/DC) electric multiple units (EMUs) based at Kanazawa Depot, as shown below, with car 1 at the Kanazawa end.
From March 1992, services were normally formed of 6-car Kanazawa-based 485 series EMUs, as shown below, with car 1 at the Kanazawa end and car 6 designated as a non-reserved seating car. Car 1 was divided into smoking and no-smoking sections.
The Kagayaki service was introduced on 13 March 1988 as a limited express service operating between Kanazawa and Nagaoka, to provide a connection travelling to and from Tokyo via the Joetsu Shinkansen. Services were initially formed of 4-car 485 series EMUs, with all cars reserved. From March 1990, the trains used on these services were extended to 6-car sets, and from January 1991, a "Green" (first class) car was added to the formations. One non-reserved seating car was included in the formations from March 1992, and at busy periods, trains often ran as 8-car formations.
Kagayaki services were discontinued from 23 March 1997, with the opening of the Hokuhoku Line and the introduction of new Hakutaka services connecting with the Joetsu Shinkansen at Echigo-Yuzawa.
With the opening of the Hokuriku Shinkansen extension beyond Nagano to Kanazawa on 14 March 2015, the Kagayaki name will be used for limited-stop services operating between Tokyo and Kanazawa. 10 return workings daily are planned using 12-car JR East E7 series and JR West W7 series trainsets, with most trains stopping only at Omiya, Nagano, and Toyama en route.