Video: 線路はつづくよどこまでも／西六郷少年合唱団

Japanese version of the American Folk Song 'I've been working on the railroad.'

United States' railroads were built primarily by African-Americans and immigrants (particularly Irish immigrants). (Source: http://folkmusic.about.com/od/folksongs/qt/WorkingonRail.htm)

This song is a very familiar nursery rhyme in Japan, with the same melody but different title and different lyrics. It is known as "Senro wa tsuzuku yo doko made mo (線路は続くよどこまでも?)" in Japan and it means "The railroad continues forever". The Japanese lyrics describe the happiness of the journey.

Source: http://en.wikipedia.org/wiki/I%27ve_Been_Working_on_the_Railroad