Yakatabune are covered sightseeing boats with a tatami dining room, and on some of them the cook fries tempura on board and serves it hot. You sit at low tables and eat as the boat moves down the Sumida River into Tokyo Bay, past the lights of the city. Shared boats take small parties, so even two people can go, but you need to book ahead.
A yakatabune company founded in 1901, where tempura is fried on the boat and brought to you the moment it comes out of the oil. Shared boats can be booked for as few as two people and leave from piers such as Ryogoku, Azumabashi and Harumi. The company has an English website.
Instead of one big platter, the tempura here is fried in sesame oil and brought to you one piece at a time, so each bite is hot and crisp. The boats leave from a pier about 5 minutes on foot from JR Hamamatsucho Station, and the company has an English website and an English menu.
An old boat company that sails from Azumabashi bridge in Asakusa, a short walk from Senso-ji temple. You sit at a horigotatsu, a low table with a hollow beneath it, so you can let your legs hang down instead of kneeling, and eat sashimi and fresh tempura. Booking is online in English, and vegetarian versions of the menu are offered.