[Nagoyankee]

I suspect a cedar pollen allergy from the little information provided. My best recommendation would be a visit to a doctor. But in case you don't want to, the best you can do is to consult at a drugstore. I myself have no allergies, so I'm unfamiliar with any particular brand of medication.

There is, however, a Japanese pharmacist on JF and you may want to ask her what brands would be best for you. I'll PM you to inform you who that is and I'll also PM her about you.