Urbanisation

In 1991, researchers at Berkeley Lab invented a triple-glazed window they hoped would revolutionise the building industry. Though windows with three panes had existed for years, what distinguished Berkley’s design from precursors was the presence of a centralised, thin layer of glass. This made the window lighter, as less material could be used to make the external panes. It also made the window more energy efficient, as compartments either side of the central layer could be filled with insulating gas. On paper, the window had the potential to cut annual heating bills by 39 percent and reduce air conditioning costs by 28 percent. The only problem was that it was prohibitively expensive to manufacture.

The so-called sharing economy has spread to a variety of fields such as cars and homes, and Japan has seen another rising trend in recent years—bicycles.

A growing number of municipalities and private firms are providing bikes to gauge whether such services will catch on.

According to NTT Docomo Inc., which has been teaming up with municipalities to offer a bike-sharing service on an experimental basis, its bicycles were used about 1.8 million times in fiscal 2016, which ended March 31, up from 20,000 in fiscal 2012.

Docomo, Japan’s largest mobile phone carrier, is partnering with Koto, Chiyoda, Minato, Chuo, Shinjuku, Bunkyo and Ota wards in Tokyo. Around 4,200 two-wheelers were available at 281 “stations” as of March. Docomo also offers bike-sharing in the cities of Yokohama, Sendai, Hiroshima and Naha, Okinawa Prefecture.