The day 3 of the tour is riding on 13 different trains form 7:30 a.m. to 11:30 p.m. It is not for everybody, it is for train geeks.

There is a monthly magazine called 「鉄道ジャーナル」(Railway Journal) in Japan. This publication in a conjunction with a travel agency in Japan used to do train tour often. Going to Far East Russia, China, Thailand, Vietnam, etc. The only purpose of the tour was riding trains, visiting train depots, and rail yards. It sure was not for everybody and not that cheap. But Japan has a lot of tour like this organized by travel agencies aiming at particular sub group of people. One popular one happening sporadically in Japan is nostalgia train tour. JR and a travel agency together plan a tour of a train which ran 30 - 40 years ago. Popular among middle age and retired train geeks. It is a nice idea, place the name of the train and run the exactly same route as that train ran 30-40 years ago. However, JR does not have same train cars that used 30-40 years ago to run that spacial train. Also, back then many limited express trains by JNR (predecessor of JR when JR was a government entity) had a dining car, long distance express train on JNR had a buffet car. But those services cannot be recreated today.

Train geeks in Japan like "no.1" or "most" type of train trivia.

Northern most train station: Wakkanai
Eastern most train station: Higashi-nemuro
Western most train station: Naha Airport (until monorail started service at Okinawa, western most station in Japan was Hirato-guchi back then, now called Tabira Hirato-gushi)
Southern most train station: Akamine (again until monorail started service at Okinawa, southern most station in Japan was Nishi-Ooyama)

So another trivia is that you can go from southern most station to western most station in 4 min. by monorail.

Highest elevation train station in Japan: Nobeyama (1345 m,4412 ft., elevation). If include "station" by other means of transportation, then Senjyoujiki on Komagatake Ropeway at 2611 m, 8566 ft.
Lowest elevation train station in Japan:
Above ground: Yatomi (Aichi, near Nagoya) at 0.93 m (3 ft.) below sea level
Under gorund: Doai (JR East Jyouetsu line at Gunma) at 70 m (230 ft.) below ground. Doai station, the platform for trains toward Takasaki and Tokyo is actually located on the ground, but the platform for trains toward Nagaoka and Niigata i slocated under ground in tunnel.