teamLab Planets — walk barefoot through water and mirrored digital art. It is Tokyo's most-booked attraction for a reason. Around ¥3,800 ($23), timed entry, book before you fly.
Shibuya Crossing and Shibuya Sky — see the world's busiest crossing from street level, then from the open-air roof 229 metres up. Shibuya Sky is about ¥2,500 ($15); sunset slots sell out first.
Tokyo Skytree — the tallest tower in the world at 634 metres. Decks from about ¥2,100 ($13). Choose Skytree for distance views, Shibuya Sky for the city-canyon feel; you do not need both.
Tokyo DisneySea — the only DisneySea on earth and the park serious Disney fans fly in for. About ¥7,900-10,900 ($49-$67) depending on date. Reach it in 15 minutes from Tokyo Station.
Senso-ji Temple, Asakusa — Tokyo's oldest temple, free, and best at 7am before the crowds fill Nakamise lane. Pair it with a Sumida river cruise toward Odaiba.
Shinjuku at night — the neon lanes of Omoide Yokocho and Golden Gai are the Tokyo of the movies. Walking is free; grilled-skewer dinners in the alleys run about ¥2,000-3,000 ($12-$18). The Metropolitan Government Building nearby has a free observation deck.
Meiji Shrine and Harajuku — a forested Shinto shrine minutes from Harajuku station, free and calm even on busy days. Pair it with Takeshita Street's crepe stalls and the Omotesando shops for one contrast-heavy morning.
Akihabara and Ueno — Akihabara is the electronics-and-anime district, best after dark when the signs light up; browsing costs nothing. Ueno Park nearby holds Tokyo's biggest museums — the Tokyo National Museum runs about ¥1,000 ($6) — plus free cherry-blossom lawns in spring.
Ghibli Museum, Mitaka — magical for Studio Ghibli fans, but tickets sell out in advance sales and are never sold at the door. Check availability before you fly; if you miss out, the Ghibli merchandise shops in Shibuya and Tokyo Station soften the blow.
Skip the fish-market tuna auction unless you truly love 4am starts — the outer market food stalls at Tsukiji from 8am give you the experience with sleep.