Yamaguchi Prefecture has a relatively long history, as it is located close to Korea. There are no big cities, but there are many attractive and interesting smaller cities, where traditional Japanese rural landscapes can still be seen on the outskirts.
People speak Yamaguchi Dialect, which is very similar to the dialect that is spoken in Tokyo, but the vocabulary is somewhat different.
When you get in Yamaguchi prefecture, you may see the sign of "Oidemase（おいでませ）" - meaning "Yokoso" or "Welcome" in Yamaguchi Japanese.
In Iwakuni, there is an American base, so some people understand English well. But in other areas, especially in rural areas, few people understand English well. So learning some basic Japanese phrases will help you so much.
In Shimonoseki, there are many Koreans. You will find some signs and guides written in Korean. You might also find people who speak Korean if you try.
Yamaguchi Ube Airport(UBJ), the prefectural airport is in Ube city. Yamaguchi Ube Airport regularly connects to Haneda Airport in Tokyo, Japan. Both JAL and ANA are offering the flights from Haneda to Ube. It's about a 90-minute flight from Haneda to Ube.
There are several rail passes that can make touring Yamaguchi more convenient and economical. In addition to the JR Rail Pass used nationwide, there are several JR West Passes that can used as well, depending on where you are starting from, such as the JR Sanyo-Sanin Area Pass, JR Okayama Hiroshima Yamaguchi Area Pass, JR Hiroshima Yamaguchi Area Pass, JR Setouchi Area Pass, and JR Sanyo Sanin Northern Kyushu Pass.
Highway buses easily connect Yamaguchi with its neighboring prefectures and beyond.
The southern part of the prefecture has the bullet train and getting around is very quick and easy, but on the Sea of Japan side the trains are very slow and infrequent. For touring the internal parts of the prefecture, a rental car is by far the most efficient and convenient. In addition to the JR network of trains, JR local buses as well as Bōchō Buses connect the north with the south.
For the latest info on events and sights, contact the Yamaguchi Prefectural Tourism Federation (山口県観光連盟, Yamaguchi-ken Kankō Renmei) Tel. 083-924-0462.