3 days in Tokyo: the sensible minimum
With 3 days you can see Tokyo — but with discernment. Do not try to cover everything: choose 2–3 neighbourhoods a day and make the most of them. A reasonable itinerary would be:
- Day 1: Shinjuku (Gyoen Park, Kabukicho, Golden Gai) + the free observation deck of the Metropolitan Government Building at dusk.
- Day 2: Shibuya (crossing, Omotesando, Harajuku) + Yoyogi early in the morning.
- Day 3: Asakusa (Senso-ji at dawn before the crowds) + Akihabara or Ueno depending on your interest.
What you will not have time for: trips outside Tokyo, Mount Fuji, Nikko, Kamakura. If they are a priority, you need more days or you save them for another trip.
Is it worth it with only 3 days? Yes, if it is a stopover within a longer trip through Japan. If Tokyo is the main destination, 3 days fall short for most travellers.