Kato will make a scale model of the freight train set pulled by the 8620 steam locomotive.

To negotiate the consecutive 33% steep slopes of Ryugamori (currently the Appi Highland), 8084 was operated with two locomotives connected with a supplementary engine on the stretch between Iwatematsuo (current Matsuohatchimantai) and Araoshimmachi. On occasion with three locomotives heading when descending the slopes.

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