the capital city in medieval times
castle town with impressive red roofs
at the tip of Honshu
a city with a beautiful wooden bridge
Japanese castle in Hagi, Yamaguchi prefecture
Buddhist temple in Hiroshima Prefecture, Japan
The closest Shinkansen station is Shin-Yamaguchi. Many Hikari and a few Nozomi trains stop there. The train link to Hagi from here is about 3 hours by limited express, but you can cut that in half by taking "Hagi-go" (はぎ号) bus to Hagi. It's run by Chugoku JR Bus.
If you want to take the train the full distance to Hagi, you'll want to take the Shinkansen to Asa station. Asa is only serviced by Kodama trains, and it is two stops from Shin-Yamaguchi and also two stops from Kokura, which is much more well serviced. From Asa take the Mine line to Nagatoshi (1 hour). Then take the San'in Line to Higashi-Hagi Station (half hour). You need to be careful to plan the connections well (both trains average about once every two hours), but if you do, this is about the same time as the bus from Shin-Yamaguchi.
If you like coastal scenery, you could also take the San'in line all the way from Shimonoseki, but this adds another hour.
The San'in Main Line runs around Hagi's main island. There are three stops in town: JR Higashi-Hagi Station (東萩駅), across the Matsumoto River to the east of the city center; JR Hagi Station (萩駅), a long walk to the south of the city center; and JR Tamae Station (玉江駅), a short walk south of the castle ruins and Mt. Shizuki.
When considering the train vs. bus question. You need to consider that local rural trains are not particularly comfortable nor do they have air conditioning, and for the bus, people that have trouble with motion sickness will have problems with the winding mountain highways, especially the way they are driven by these buses.
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