Just reading this on the travel.state.gov site:
"Confiscation of Prescription Drugs and Other Medication: The Japanese government decides which medications may be imported legally into Japan. The Embassy and Consulates of Japan have limited information available and do not have comprehensive lists of specific medications or ingredients.
You can bring up to a two-month supply of allowable over-the-counter medication and up to a two-month supply of allowable vitamins into Japan duty-free. However, it is illegal to bring some over-the-counter medicines commonly used in the United States, including inhalers and some allergy and sinus medications into Japan. Specifically, products that contain stimulants (medicines that contain pseudoephedrine, such as Actifed, Sudafed, and Vicks inhalers) or codeine are prohibited. You can generally bring up to one month's supply of allowable prescription medicine into Japan. You must bring a copy of your doctor's prescription as well as a letter stating the purpose of the drug. However, some U.S. prescription medications cannot be imported into Japan, even when accompanied by a customs declaration and a copy of the prescription. "
Has anyone not been able to bring sudafed, etc. or been asked to show Rx for other meds. Two of us are asthmatics and have inhalers, etc. Plus we always travel with OTC meds like sudafed, etc. Wasn't expecting this to be a problem.
BTW - here is the full link for info. above: …state.gov/travel/cis_pa_tw/cis/cis_1148.html