First time visit with family (2 kids)

Please provide feedback on the following itinerary. Is it feasible to achieve with two children? I am traveling from a time zone that is five hours behind. We are not planning to do Disneyland. Can someone please recommend what I can skip and what else to include ?

1. Mar 19 (Wed)
   Tokyo (Arrival Day)
   Land at Narita → airport transfer → check-in → relax nearby (evening stroll, simple dinner)
   Tokyo (Shinjuku or Tokyo Station area)

2. Mar 20 (Thu)
   Tokyo
   Asakusa (Senso-ji Temple & Nakamise Street), Shibuya Crossing, Shinjuku night walk
   Tokyo (same hotel)
   Light city sightseeing to ease into the trip.

3. Mar 21 (Fri)
   Gala Yuzawa
   Early Shinkansen to Gala Yuzawa (~90 min), skiing/snow play, hot spring in evening
   Gala Yuzawa hotel
   Book ski pass + rentals online; arrive by 9–10 AM.

4. Mar 22 (Sat)
   Tokyo
   Morning snow fun → return to Tokyo by afternoon → relax or shopping
   Tokyo (same hotel as Mar 19–20)
   Easy evening — visit Odaiba or Ginza if time.

5. Mar 23 (Sun)
   Tokyo (Nikko Day Trip)
   Nikko Toshogu Shrine, Shinkyo Bridge, Kegon Falls
   Tokyo (same hotel)
   Early start (2 hr train ride). JR Nikko Pass helps.

6. Mar 24 (Mon)
   Kawaguchiko / Hakone
   Travel to Mount Fuji area (2–3 hrs), check into onsen ryokan, relax (anniversary eve)
   Kawaguchiko or Hakone ryokan
   Choose room with private onsen or Fuji view.

7. Mar 25 (Tue)
   Kawaguchiko / Hakone → Tokyo
   Anniversary breakfast, Fuji sightseeing (Lake cruise / Ropeway), return to Tokyo evening
   Tokyo (same hotel as before)
   Nice romantic lunch before returning.

8. Mar 26 (Wed)
   Tokyo (Cherry Blossom Day)
   Cherry blossom picnic (Ueno Park or Chidorigafuchi), shopping in Ginza or Shibuya
   Tokyo (same hotel)
   Capture family photos; reserve a nice dinner.

9. Mar 27 (Thu)
   Tokyo → Narita (Departure)
   Check out → Narita (allow ~1.5 hrs) → flight