On March 26, 2016, the new Series H5 will enter service on Japan's latest shinkansen line, which runs through the world's longest undersea tunnel between Honshu and Hokkaido. Rena Matsui reports on the build-up to Hokkaido's first shinkansen arrival, the brand new Shin-Hakodate Station, and the latest technology to combat the cold. Also see the challenges of the Shinkansen sharing the line with freight trains, and discover the only place in Japan with presenter Russell Totten where anyone can drive a real steam locomotive.

• Rena Matsui
• Maiko Ishii
• Miki Murai