A Tokyo-only version for families who want one easy home base, fewer hotel changes, and a first Japan trip that still feels full. This is great if you are not ready to add Kyoto, Osaka, or the countryside yet.
Day 1: Arrive in Tokyo, stay near Shinagawa, easy hotel dinner, early bedtime.
Day 2: teamLab Planets + Odaiba.
Day 3: Maxell Aqua Park Shinagawa + Happo-en + Shibuya.
Day 4: Meiji Shrine + Harajuku + Kiddy Land.
Day 5: Asakusa kimono rental + Senso-ji + Nakamise + Tokyo Skytree.
Day 6: ANO-NE Kids Club + Tokyo DisneySea evening tickets.
Day 7: Full Tokyo DisneySea day, or swap this for Tokyo Disneyland, Ueno, Ginza, or a flexible shopping and snack day if that fits your family better.
This is the version I would recommend for families who want Japan to feel exciting but not exhausting.