Airline counters, immigration, baggage inspections...

Airline counters, immigration, baggage inspections, currency exchanges, duty-free shops, all of which are lined up and take time to respond.
You may be able to call a taxi driver in the arrival lobby, but if you carefully check the market price and tell it, you can get a reasonable price reduction. There is a bus stop nearby, but it is very crowded because it is for local people, so I think it is difficult to ride with a large bag.
When I returned to Japan, even if I arrived two hours before the flight, I am wondering if I can board safely because there are long lines everywhere.
After leaving the country, there are some shops that look like supermarkets, and you can purchase sweets for spreading in the city and alcohol such as rum. There are also various cigars available, and you can buy them while checking your taste.
Choi Guevara T-shirts should be bought in the lobby before departure procedures.
When leaving the country, if you are unlucky and the timing of the arrival flight is in time, the money exchange in the lobby will be in a long line and you will have to wait for an hour or more, but there is a money exchange counter after the immigration check, so you can change it there, It's a good idea to buy a souvenir and get your change for US$.