Tokyo's taxi industry is undergoing some radical changes as Japan, already dealing with unprecedented levels of tourism, gears up to host two major sporting events in the next 26 months.

More than 28 million tourists visited Japan in 2017 and the government has set a goal of 40 million foreign visitors by 2020, loading more and more pressure on Tokyo's already stressed transport system.

Toyota, the world's largest car manufacturer, believes it has at least part of the answer to this problem.