For those who are traveling to Yamaguchi Prefecture, there are several ways to reach the region. There is shinkansen access to the prefecture, but it also conveniently boasts two airports - the Yamaguchi Ube airport on the west side of the prefecture, and the Iwakuni Kintaikyo airport on the east side. Iwakuni Kintaikyo airport offers services to and from Tokyo's Haneda airport and Naha airport in Okinawa, as well as being home to the US Marine Corps Air Station for military operations.
As this is a smaller regional airport, the options for shopping and dining are limited, but you won't go hungry. The one on-site restaurant is Rukka Coffee, which has a variety of dishes on offer - options include several different ramen types, curry rice, katsu, burgers, and more. The menu is written in both Japanese and English, making the ordering process easy. The Sky Shop sells different Yamaguchi-based products if you're looking for a souvenir from your time in the area.
For those who plan to continue exploring the local area by car, there are four car rental company counters on the first floor. One of the benefits of flying into Iwakuni Kintaikyo airport is that it's under an hour's drive from Hiroshima City, for those who may want to explore there as well.