After touring an actual Japanese garden, we tried winding our way back through the streets to the bus station (we'd taken a taxi to the museum but the station wasn't far at all). When we got stuck at one point I called out to a nearby teen who was walking by with his head respectfully down. "Sumimasen," I was able to forage from my scant Japanese, "Narita-eki wa doko desu ka?" I felt proud of myself but then the instructions, naturally, came to me in Japanese which I couldn't understand. I did get his hand gestures, and we found our way back in plenty of time to go back through passport registration and catch our flight.
But before that, we wrote quick notes to ourselves on postcards from the calligraphy museum, and I mailed them to ourselves at this airport post office.