30 free things to do in Tokyo

This 25th-floor 'lounge' sits 105 metres above the ground, and features great views of Tokyo Skytree, Shinjuku, and as far as Mt Fuji and the Chichibu Mountains. The 330-degree panorama is especially spectacular at night, when the non-reflective windows really make a difference.

Also known as 'Sake Plaza', the Japanese Sake Information Centre makes available an abundance of information about Japanese alcohol. As well as being able to search for particular brands by computer, there is also a library with around 6,000 books on the topic of sake. You're welcome to give all that a miss, of course, and move swiftly on to the tasting area. Need we say more?

Rest your tired feet in some pleasantly warm water at this unique facility in Kodaira. Ground water is diverted up through a 250-metre deep well and then warmed with leftover heat from the neighbouring waste processing plant, resulting in a man-made 'hot spring'. If you did bring your wallet, the shop here sells special towels (¥100) and handkerchiefs (¥200) designed by students from nearby Musashino Art University. 

Built on reclaimed land by the Yokojikken River, this waterside park has an active group of volunteers who bring out their traditional, wooden Japanese-style boats once every week. Jump on board for free, or get there early (from 10am) to apply for the right to try your hand at steering.