Checked against UN INCB controlled substance lists and Japan rules.
Amphetamine-based ADHD medication is prohibited in Japan and cannot be imported even with a doctor's prescription. Possession is a criminal offence.
Adderall contains a substance on the UN International Narcotics Control Board lists. Most countries that signed the UN drug conventions expect you to carry a prescription and declare it.
Leave it at home. Ask your doctor about an alternative that is legal at your destination, and carry a doctor's letter describing your condition.
Official source for Japan: www.mhlw.go.jp
Check Adderall in 21 countriesNot legal or medical advice. Rules change and depend on dose, form and quantity. Always confirm with the Japan embassy or health authority before you fly. We never tell you a medicine is "safe" to carry.