Ekiben Hitoritabi (2006)

Most people would be concerned about getting a ticket to go around the country by rail, alone, for their wedding anniversary, with their significant other calling it a special break from them - but not Daisuke Nakahara. For this thirty-five year old train and ekiben (train station box lunch) enthusiast, a trip around Japan - spotlighting each region’s seasonal delicacies - is the present of his dreams, with each stop - and tasty titbit - telling a story about the region’s food and its history. The first stop in his trip, Kyushu, by special express sleeper train, And from there, the track less travelled.

Source: www.anisearch.com/manga/3384