Dress in layers with warm, waterproof clothing in December in Japan, as the average temperature is 45°F (7°C). How should I dress for Tokyo in December? Pack warm clothes for Tokyo in December, with layers to adjust to the varying temperatures.
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Narcotics such as opium, cocaine, heroin, MDMA, magic mushrooms, stimulant drugs (stimulant drugs contained in an inhaler or items containing stimulant drug ingredients), cannabis, opium smoking paraphernalia and psychotropic drugs are not allowed in Japan.
Try to be mindful of the type of shoes you're wearing, as certain shoes, such as sandals, might not be allowed in some indoor spaces. If you're given slippers at the entrance to a building remember to wear them inside only! We know they're comfy but these aren't meant for sightseeing or as a souvenir!