(GMT)18 JUN 2019 EDO_RE:
Fortunately the town of Narita is under 10 minutes away by train. Store luggage on the airport's arrival floors (from ¥500, about USD$6.50 for a small bag) or in lockers at the train stations in Narita City. Be sure to keep your passport with you (it’s required to re-enter the airport), and since many businesses and rail lines don’t accept plastic and nobody accepts foreign currency, you’ll probably want to withdraw cash before leaving the airport. Tourist information counters at the airport or in Narita City have maps and other info in English, and in town many shops have English signage.
Although taxis are available (about ¥3,250 - USD$42.50 - each way), it’s so much more Japanese and so much less expensive to go by train. Local trains on the private Keisei (say KAY-say) line depart from the airport's basement floor and cost ¥250 (about USD$3.25) - purchase tickets from vending machines (also very Japanese).