The oil crisis of the 1970s had a major impact on Japan's economy, leading to increased focus on energy conservation and alternative sources of energy.
The Japanese yen is the official currency of Japan and is the third most traded currency in the world, after the US dollar and the euro.
Tennis is also popular in Japan, with several Japanese players competing at the highest level of the sport, including Naomi Osaka and Kei Nishikori.
