Economy of Japan
The Japanese agricultural sector accounts for about 1.4% of the total country's GDP. Only 12% of Japan's land is suitable for cultivation. Due to this lack of arable land, a system of terraces is used to farm in small areas. This results in one of the world's highest levels of crop yields per unit area, with an overall agricultural self-sufficiency rate of about 50% on fewer than 56,000 km² (14 million acres) cultivated.
Demographics of Japan
Japan's population density was 336 people per square kilometer as of 2014 (874 people per square mile) according to World Development Indicators. It ranks 35th in a list of countries by population density, ranking directly above Philippines (347 per km) and directly below Curacao (359 per km). Between 1955 and 1989, land prices in the six largest cities increased 15,000% (+12% a year). Urban land prices generally increased 40% from 1980 to 1987; in the six largest cities, the price of land doubled over that period. For many families, this trend put housing in central cities out of reach.
The result was lengthy commutes for many workers in the big cities, especially in Tokyo area where daily commutes of two hours each way are common. In 1991, as the bubble economy started to collapse, land prices began a steep decline, and within a few years fell 60% below their peak. After a decade of declining land prices, residents began moving back into central city areas (especially Tokyo's 23 wards), as evidenced by 2005 census figures. Despite nearly 70% of Japan being covered by forests, parks in many major cities—especially Tokyo and Osaka—are smaller and scarcer than in major West European or North American cities. As of 2014, parkland per inhabitant in Tokyo is 5.78 square meters, which is roughly half of the 11.5 square meters of Madrid.