For a first-time visitor in 2026, 10 to 14 days is widely considered the ideal duration to experience the "Golden Route" without feeling rushed. A 10-day itinerary typically allows for 4 days in Tokyo (exploring Shibuya, Shinjuku, and Asakusa), 3 to 4 days in Kyoto (visiting Gion and Arashiyama), and 2 days for day trips to Nara or Mount Fuji. If you can extend to 14 days, you can comfortably add Hiroshima, Miyajima, and the food-centric streets of Osaka. Travelers with only 7 days can still have a great experience by focusing strictly on Tokyo and Kyoto, but the pace is much faster. Conversely, if you want to explore the northern island of Hokkaido or the tropical beaches of Okinawa, you would need at least 21 days. The 10-14 day window strikes the best balance between seeing the iconic sights and having time to get lost in the narrow alleys that give Japan its true character.