Is it rude to eat while walking?

Generally, yes. It is considered better manners to eat standing near the shop where you bought the food or finish it before moving on.

How do I tip in Tokyo?

You don't. Tipping is not part of the culture and can sometimes be seen as confusing or rude. The price you see is the price you pay.

Only if you have heavy luggage or missed the last train (usually around midnight). Otherwise, the train system is always faster and cheaper.

How to navigate Tokyo’s neighborhoods like a local

To navigate Tokyo like a local, master the JR Yamanote loop line and use Google Maps to identify which specific subway exit to take. Avoid cross-city travel during morning and evening rush hours, and always rely on IC cards for seamless transfers between different rail operators.

Get an IC card immediately. Upon arrival at the airport, purchase a Welcome Suica or Pasmo Passport at a machine. This digital-ready card allows you to tap in and out of all trains and buses without buying individual paper tickets.
Master the station exit system. Tokyo stations are massive complexes. Use Google Maps to see your exact exit number (e.g., 'Exit A4') before you step off the train. Following signs for your exit *inside* the station saves you from walking an extra 15 minutes above ground.
Use the Yamanote Line as your backbone. The green JR Yamanote loop line connects most major neighborhoods like Shinjuku, Shibuya, Ueno, and Akihabara. Use this to orient yourself; if you are lost, find a Yamanote station to reset your position.
Learn the difference between JR and Metro. Tokyo has two main rail networks: JR East (surface trains) and Tokyo Metro/Toei (subways). Your IC card works on both, but transfers between them often require you to exit through a transfer gate. Don't worry—just tap your card again.

Is it rude to eat while walking?: Generally, yes. It is considered better manners to eat standing near the shop where you bought the food or finish it before moving on.
How do I tip in Tokyo?: You don't. Tipping is not part of the culture and can sometimes be seen as confusing or rude. The price you see is the price you pay.
Are taxis worth it?: Only if you have heavy luggage or missed the last train (usually around midnight). Otherwise, the train system is always faster and cheaper.