Nowadays, one can cross via the shinkansen “bullet train” utilizing the world's longest undersea Seikan Tunnel--an impressive feat of engineering.
The Tōhoku region is located on the northeastern portion of the main island of Honshū. The region is largely mountainous, so most of its cities are located along the Sea of Japan or Pacific Ocean coasts. The area is also known for its long winters and short summers, and the western side receives heavy snowfall during the winter. Like Hokkaido, the area’s principal industries are agriculture, forestry and fishing. Aomori is famous for its apples, and Akita is famous for its rice and sake.
The southern part of Tōhoku includes Fukushima, site of Japan’s so-called triple disaster, where a strong earthquake triggered a tsunami that caused a meltdown at the area’s nuclear facilities. However, cruise lines do not dock at any ports in the region that have any concerns about nuclear contamination.