Check your actual route
Look up the last useful train for your destination, including transfers, through the transport operator’s current journey information. The last departure from one station may not connect to your accommodation. Save an alternative route before leaving.
Keep essentials available
Save your accommodation name and address in Japanese, charge your phone and keep enough payment capacity for a licensed taxi. Check the fare estimate and any late-night surcharge with the operator. Do not assume all bars remain open until trains restart.