In summer, most areas in Japan are hot and humid. Hokkaido Island, which is the most northern part of Japan, is the only exception. However, air conditioning systems have become the norm in all big buildings in Japan, even in Hokkaido, due to increased internal generation of heat from lights and equipment such as computers and printers. However, the outside air temperature often drops below 26C during summer everywhere in Japan even when cooling and air conditioning is turned on.
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