What You Cannot Bring to Japan

A Simple Guide to Prohibited and Restricted Items

The easiest way to avoid trouble at the airport is to separate two different kinds of rules. Some items are restricted because they are illegal or tightly controlled in Japan. Others are mainly restricted by airline safety rules. CBN belongs to the first group. Mobile batteries belong to the second. As of June 1, 2026, CBN is listed as a designated substance in Japan, and from April 24, 2026, Japan also applies new in-flight rules for mobile batteries. (厚生労働省)

1. Items you should not bring

Do not bring illegal drugs, firearms, explosives, counterfeit money, forged cards, or fake branded goods into Japan. Japan Customs also lists articles that infringe intellectual property rights as prohibited imports, which means counterfeit products can be stopped at customs. (税関ホームページ)

CBN products should also be treated as off-limits. Japan’s Ministry of Health, Labour and Welfare lists CBN as a designated substance effective June 1, 2026, so bringing CBN into Japan is not something travelers should risk. (厚生労働省)

2. Food is where many travelers make mistakes

Meat and meat products are one of the biggest problem areas. Japan’s Animal Quarantine Service says meat products are generally prohibited, even in small amounts. Vacuum-packed products are not automatically safe, and instant noodles are generally prohibited if meat appears on the ingredient label. Penalties can reach up to three years of imprisonment or a fine of up to 3 million yen for individuals. (農林水産省)

Fruits, vegetables, seeds, and other plants are also tightly controlled. Japan’s Plant Protection Station says plants require a phytosanitary certificate from the exporting country and must go through import inspection, regardless of quantity or intended use. If the certificate is missing, the plants can be disposed of. (農林水産省)

So the safest rule is simple: do not pack meat, fruit, vegetables, seeds, or plants unless you have checked the official requirements in advance. (農林水産省)

3. Prescription medicine is not automatically safe

Many travelers assume that a prescription makes everything acceptable. It does not. Japan’s health guidance says that, for personal use, prescription medicine is generally limited to up to one month’s supply without extra procedure, while medicines and quasi-drugs are generally limited to up to two months’ supply. (厚生労働省)

Some categories are much stricter. Japan’s Narcotics Control Department says controlled substances such as narcotics, stimulants’ raw materials, and certain psychotropics may require advance permission. It also states clearly that Adderall cannot be imported into Japan, even for treatment purposes. (厚生労働省 ナショナルセンター データベース)

If a traveler needs regular medication, the smart approach is to check the active ingredients before departure, not just the brand name on the box. (厚生労働省 ナショナルセンター データベース)

4. Cash and alcohol are not banned, but they may need declaration

Cash is not prohibited, but it does trigger a declaration rule. Japan Customs requires declaration when cash, checks, promissory notes, securities, or similar means of payment exceed 1,000,000 yen or its equivalent. (税関ホームページ)

Alcohol can be brought into Japan, but the duty-free allowance is limited. Japan Customs lists the allowance as three bottles, with one bottle counted as 760 ml. (税関ホームページ)

5. Mobile batteries follow airline safety rules

Mobile batteries are not mainly a customs problem. They are an aviation safety issue. Japan’s Ministry of Land, Infrastructure, Transport and Tourism announced new rules that apply from April 24, 2026. Under the new rule, passengers may carry up to two mobile batteries, each limited to 160Wh or less, and they must not charge the battery itself on board or use it to charge other devices during the flight. (国土交通省)

The ministry also explained that mobile batteries must not go into checked baggage. In practice, travelers should keep them in carry-on baggage and follow any additional airline instructions. (国土交通省)

Final rule

If you want the simplest version, remember this. Do not bring meat. Do not casually bring fruit, vegetables, or plants. Check every prescription medicine before you fly. Declare large amounts of cash. Treat mobile batteries as a separate flight-safety rule. That is the easiest way to avoid airport trouble in Japan. (農林水産省)