This is a basic tourist itinerary for 2 weeks. You might also consider adding other cities like Koya-san, Kobe, Kanazawa, Takayama, or other less well-known spots. As for Hiroshima, 2 days is great, but be mindful, it can be exhausting due to transportation time, so plan carefully!

15-Day Japan Itinerary – Suggested Plan

Tokyo: 3 to 4 days
Spend a few days exploring Tokyo’s key neighborhoods. Consider adding a day trip or half-day trip to places like Kamakura, Yokohama, Enoshima, or Kawagoe for a change of scenery.
Mount Fuji Area: 1 to 2 days
Explore the Mount Fuji region with a stay in Hakone or Fujikawaguchiko.
Note: You’re most likely to get clear views of Mount Fuji from Kawaguchiko, so plan accordingly!
Kyoto: 3 to 4 days
Immerse yourself in Japan’s cultural capital, famous for its temples, shrines, and historic districts.
Osaka: 2 days
Enjoy Osaka’s vibrant street food, nightlife, and attractions like Universal Studios Japan.
Last day:
Keep some flexibility for your final day, whether it’s shopping, a last-minute visit, or simply relaxing before departure.

Spending 2 days in Hiroshima is great if you want to explore at a relaxed pace, but it’s not always the most efficient choice, especially considering the travel time. Keep that in mind when planning!

For a 20 day-itinerary :

🏙 Tokyo → 7 days total

Day 1-3 → Tokyo (Shibuya, Shinjuku, Asakusa, Ginza, Akihabara, etc.)
Day 4-5 → Day trip like Kamakura / Enoshima or Yokohama (day trip)
Day 6 → Extra Tokyo day trip (for example: Nikko or Kawagoe)
Day 7 → Tokyo chill day: explore local neighborhoods like Shimokitazawa, Yanaka, or Odaiba. The neighborhood you didn't do.

🌋 Mount Fuji / Hakone / Kawaguchiko → 2 days

Day 8-9 → Stay overnight in Hakone or Kawaguchiko, enjoy onsen and Mount Fuji views

🏯 Kyoto → 4 days total

Day 10-13 → Kyoto (Fushimi Inari, Arashiyama, Kiyomizu-dera, Gion, Philosopher’s Path)

🍜 Osaka → 2 days

Day 14-15 → Osaka (Dotonbori, Namba, Umeda, Universal Studios, or Kaiyukan Aquarium)

🚅 Day trips from Osaka/Kyoto → 2 days total

Day 16 → Nara (deer park, Todai-ji, Naramachi) or Uji (matcha town, Byodo-in)
Day 17 → Himeji (famous castle), Koyasan (Buddhist temple stay), Amanohashidate (coastal views), Kobe, Arima onsen, etc..

⚡ Hiroshima & Miyajima → 2 days OR Japanese Alps with Takayama & Kanazawa

Day 18-19 → Hiroshima (Peace Memorial, okonomiyaki) + Miyajima (floating torii gate)

🎁 Back to Tokyo or city where you flight → 1 day

Day 20 → Last-minute shopping or just relaxing before your flight home