[Carlos]

According to this (from the US Embassy in Japan): https://www.us.emb-japan.go.jp/itpr_en/bringing-medications-to-japan.html , you also need to fill out this form (https://www.mhlw.go.jp/english/policy/health-medical/pharmaceuticals/dl/qa2.pdf) and be approved, in advance, by the Japanese government just to bring in a CPAP into Japan.

Why? I don’t know. Maybe they want to make sure you’re not using it to smuggle in contraband (like drugs, etc.). Seems pretty silly to have to go through the same procedures as actual medication.

When my friend and I went to London in 2019, I brought my CPAP and my friend brought in OTC cold medicine for personal use as easily as our own clothes.