Items designated as prohibited by the Civil Aeronautics Act cannot be placed inside checked baggage. (Examples include toxic gases, flammable gases, flammable liquids, compressed gases.) Although dry ice, alcoholic liquids, and cigarette lighters fall under the ?Prohibition for Carriage of Explosives etc.

Japan has some of the strictest aviation security protocols in the world regarding checked baggage. The most common "caught" items are spare lithium batteries and power banks, which are strictly prohibited in the hold due to fire risk and must be carried in your cabin bag. Lighters and matches are also forbidden in checked luggage; you are generally allowed one small lighter on your person. Other prohibited items include flammable liquids (like lighter fluid or paint), compressed gases (camping stoves), and oxidizing substances (bleach). Specifically for Japan in 2026, be careful with electronic cigarettes (vapes), as some airlines prohibit them in checked bags. Additionally, Japan’s animal and plant quarantine laws are very strict: bringing meat products (even jerky or ham sandwiches) or certain fruits/vegetables into the country can result in heavy fines or even arrest if they are not declared and inspected upon arrival.