·You are not allowed to open the bag until you have left Japan. If you open the bag and use the item(s), you will be required pay taxes at customs.
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Here are some key areas where Japan Customs tends to be strict: Prohibited Items: Japan has a list of prohibited items, including firearms, narcotics, and certain animal and plant products. Bringing any of these into the country is a serious offense and can lead to severe penalties, including imprisonment.