The Keikyu Main Line would be great for TS2020 as their are no modern Japanese routes for the game. Wikipedia Information: https://en.wikipedia.org/wiki/Keikyu https://en.wikipedia.org/wiki/Keikyū_Main_Line
Only group who would most likely make this is Union Workshop, but they seem to be making 2 other routes atm. https://m.weibo.cn/u/5051373059?fbclid=IwAR3EHaqcG2PahalaT-quRbUkF2Q-bavRu56V0jDyq_1x-wrDxMWdLV8aoJY
