Classic route idea
A first Japan trip usually shines with Tokyo, Hakone or Fuji-area hot springs, Kyoto, and Osaka, with Nara, Hiroshima, Kanazawa, or the Japanese Alps added when the schedule allows.
The custom choices matter: a ryokan night or a modern luxury hotel, a food-first Tokyo plan, temples at slower hours, private guiding for Kyoto, anime and pop culture, gardens, art islands, skiing, cherry blossoms, or fall color.