https://www.youtube.com/watch?v=aOqhja5Pa7c , https://www.japanrailclub.com/japan-most-luxurious-trains The concept of having intercity express trains have been around for generations. Luxurious train travel remains popular for those who can afford it.
https://theprivatetraveller.com/train-reviews/train-suite-shiki-shima
https://www.jreast.co.jp/en/shiki-shima/en , https://www.twilightexpress-mizukaze.jp/en
https://www.japan.travel/en/experiences-in-japan/2913
While for some, Japan might be considered to be a small country, its a linear nation with a substantial population.
https://luxurytrainclub.com/category/country/japan
