No, 5 days in Tokyo is actually the ideal minimum duration for a first-time visitor in 2026, and many find it is still not enough to see everything this massive metropolis has to offer. A well-structured 5-day itinerary allows you to explore the city's distinct "neighborhood-cities" without feeling rushed. You can dedicate one day to the traditional vibes of Asakusa and the futuristic TeamLab Borderless in Odaiba, another to the "kawaii" culture of Harajuku and the neon lights of Shinjuku, and a third to the high-end shopping of Ginza and the famous Shibuya Scramble. This timeframe also leaves space for a potential half-day trip to see the Giant Buddha in Kamakura or the stunning views of Mt. Fuji from Lake Kawaguchiko. With Tokyo being home to over 160,000 restaurants and countless hidden shrines, five days barely scratches the surface. If you stay longer, you can delve into niche interests like anime in Akihabara or the world-class museums in Ueno Park, but for a standard vacation, 5 days provides the perfect balance of "high-speed" sightseeing and leisurely exploration of the world's most populous city.