Three Japanese railways are introducing new luxury train services that will make the Shinkansen's exclusive Green Cars seem like the Yamanote Line at rush hour. Later this year, Kyushu Railway Co. will be starting operations of their "Seven Stars in Kyushu" cruise train, while East Japan Railway Co. announced earlier this month its plans for a new luxury sleeper train to start operations in spring 2016. In March West Japan Railway Co. also announced that it is considering its own brand of luxury trains, but didn't offer details.

Kyushu...