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.

When traveling to Japan in 2026, there are several "red flag" items that can lead to immediate confiscation or legal trouble. First, meat products of any kind (including beef jerky, sausages, or vacuum-sealed snacks) are strictly prohibited due to animal disease prevention; sniffer dogs at airports like Narita are highly efficient at finding these. Second, certain over-the-counter medications containing pseudoephedrine (like some Sudafed formulas) or codeine are illegal. Third, as of April 2026, Japan has introduced a strict ban on the in-flight use or charging of power banks on all flights to and from the country; while you can carry them in your cabin bag (maximum two units under 160Wh), you cannot use them during the flight. Additionally, CBD products and any cannabis-related items are a major legal risk, as Japan has some of the world's strictest drug laws. Finally, avoid bringing fresh fruit, vegetables, or soil. Always declare any doubtful items on the "Visit Japan Web" app before landing to ensure a smooth transition through the increasingly tech-driven customs checkpoints.