Japan's public transportation system is efficient, affordable, and convenient for tourists. Invest in a JR Pass if you're planning to travel long distances. Take advantage of Japan's advanced railway network, where trains operate frequently to reach even remote locations. Also, Japan's cities are bike-friendly, making it easy to rent a bicycle and explore the city with your partner.
If you have more time, consider adding a visit to the quaint city of Takayama or the stunning Naoshima Island. If you have less time, prioritize the sights that interest you the most and consider splitting up some of the more extensive areas over multiple days. Additionally, take into account Japan's weather before planning; spring and fall seasons are especially beautiful in Japan.
Japan's major airports are Narita International Airport (NRT) and Haneda Airport (HND) in Tokyo. Narita is farther from central Tokyo, but the Keisei Skyliner is a quick and convenient way to the city in under an hour. Haneda is closer to the city and easily accessible via monorail. Kansai International Airport (KIX) serves Osaka, while Chubu Centrair International Airport (NGO) serves Nagoya. Both are international airports and offer extensive transportation links to nearby cities.