Transfer from Narita (N'EX 60–90 min) or Haneda (monorail ~30 min) to Shinjuku and check into your hotel; use luggage forwarding if you arrive early and the room isn’t ready.
Free panoramic views of Tokyo from the observation deck — a good orientation to the city; open daily but check seasonal hours (typically 9:30am–11:00pm for the North deck).
Whimsical Studio Ghibli museum; tickets must be purchased in advance for a timed entry slot (typical opening hours 10:00am–6:00pm with specific entry times).
Browse fresh seafood stalls and small eateries; ideal for late-afternoon snacks (outer market usually open until mid-late afternoon hours vary by stall).
If time permits, visit Character Street (Tokyo Station) or department store basements for souvenirs — many shops open from 8:00–10:00am depending on location.