2017/9/9. USA casino, Welcome to Japan!
MGM’s Murren hints local-led, 2025 target for Japan casino
https://www.ggrasia.com/mgms-murren-hints-local-led-2025-target-for-japan-casino/
I think that the suitable place for casino is near the station which Shinkansen stops (High-speed express), for example Shinagawa, Tokyo & Ueno. But there are a few places enough for casino. Toyosu or Tukiji will be casino places.