Is the Tokyo subway open 24 hours?

No. Most lines stop running between 12:30 AM and 5:00 AM. Plan to use a taxi if you are out late.

Do I need to show my ticket when I exit?

If you use an IC card, just tap your phone on the reader at the exit gate. If you buy a paper ticket, insert it into the gate; it will be kept by the machine.

Can I eat or talk on the phone while on the train?

It is considered poor etiquette to talk on your phone or eat/drink on local trains. Keep your phone on silent mode.

Navigating the Tokyo Subway System Like a Local

Download the Japan Transit by Jorudan app to track real-time routes, and use a Suica or Pasmo card on your smartphone to tap in and out seamlessly. Always follow the floor markings on the platform to stand in the correct queue, as Tokyo trains arrive with precision to the second.

Set up your IC card. If you have an iPhone, add a Suica or Pasmo card directly to your Apple Wallet via the 'Wallet' app. If on Android, download the mobile Suica app. This allows you to tap your phone at every gate without buying paper tickets.
Understand the two main networks. Tokyo has two main operators: JR East (surface trains like the Yamanote line) and the Tokyo Metro/Toei Subway (underground). While they are separate companies, your IC card works on both.
Read the platform floor cues. Platforms feature colored lines and numbers on the floor. Look for the display screen above the platform to see which colored symbol corresponds to your train car. Line up exactly behind the markings; local commuters will strictly follow this order.
Master the station exits. Major stations like Shinjuku or Tokyo Station have dozens of exits. Before you leave the train, check the station map on the platform or the Google Maps 'exit info' to find the specific exit number (e.g., B3) closest to your destination to save walking an extra 15 minutes.

Is the Tokyo subway open 24 hours?: No. Most lines stop running between 12:30 AM and 5:00 AM. Plan to use a taxi if you are out late.
Do I need to show my ticket when I exit?: If you use an IC card, just tap your phone on the reader at the exit gate. If you buy a paper ticket, insert it into the gate; it will be kept by the machine.
Can I eat or talk on the phone while on the train?: It is considered poor etiquette to talk on your phone or eat/drink on local trains. Keep your phone on silent mode.