Japan is a very highly developed country because of it's high GDP, or gross domestic product. The GDP measures the sum total of the income generated by the country's productive activities.
Although Japan has few raw materials, it excels in the manufacturing sector because of it's ability to import a large amount of raw materials from other countries and using them, manufacture goods that can then be exported back. Japan's forte lies in the manufacturing of electronics and robotics.
Japan also has an extensively developed transportation network in it's country, with means of traveling that include road, air, rail and sea. Japan's bullet trains, or high-speed trains, have garnered international accolades.