Clear immigration, pick up SIM/transport card and drop off luggage at your hotel or airport coin lockers so you can sightsee hands‑free; terminals have cafes that open ~6:00am.
Historic Senso‑ji temple and the Nakamise shopping street — a great intro to traditional Tokyo; temple grounds are accessible early, shops typically 9:00–18:00.
Early fresh sushi or seafood bowls at Tsukiji's outer market stalls (many vendors open from ~5:00–6:00 to early afternoon); best early for freshest options.
Historic Buddhist temple complex with gardens and the atmospheric Omotesando shopping street; temple grounds open year‑round (some museum exhibits open ~9:00).
Return to Narita Airport early to browse duty‑free, pick up snacks and ensure smooth check‑in the next morning; airport opens early and has many shops.
Early breakfast and check‑out; aim to leave the hotel so you arrive at the airport with the airline's recommended time (usually 2–3 hours prior to departure).