Tokyo Bay has several amusement parks and arcades designed to entertain children and teens – most notably Tokyo Disney Resort (a 15-minute train ride away). Boozy bay cruises are a popular activity for grown-ups.
Those low-slung wooden boats out on the bay, bedecked with lanterns, are yakatabune (pleasure boats) and they’ve been a Tokyo tradition since the days of Edo. Most often they're chartered for private banquets, but a few companies run shared cruises that you can book for a minimum of two people. Reservations are essential.
Funasei 2¾-hour cruises depart at 5:45pm or 6:30pm from Kita-Shinagawa, from where you'll sail on Tokyo Bay and then up the Sumida-gawa to Asakusa (for views of Tokyo Sky Tree) and back; packages include sashimi and tempura dinners and all-you-can drink beer, wine and sake. HIS travel agency handles reservations; see the website for details.
Tsukishima Monja Yakatabune Two-hour (day and night) cruises around Tokyo Bay with free-flowing beer and all-you-can eat monja-yaki (a savoury, scrambled batter-style dish and Tokyo speciality). This package is cheaper than most; the drawback is the inconvenient departure point at Shin-Kiba pier; free shuttles from Shin-Kiba Station to the pier depart every 10 to 20 minutes, 35 to 15 minutes prior to the boat's embarkation.