I'm a US passport holder. My flight lands at Narita airport at 4 pm and does not fly out till 11 am next day.
Do I need a transit visa?
Is it okay for me to leave the airport to explore and come back next morning?
Travel Stack Exchange is a question and answer site for road warriors and seasoned travelers. It only takes a minute to sign up.Sign up to join this community
US citizen are entitled to stay up to 90 days as a tourist in Japan. Answer is from official Embassy Of Japan USA.
Since you have a 19 hours layover at Narita airport, you can simply enjoy visa free acess to Narita city. Further you also don't need any transit visa as a US citizen.