Engineer: Tetsudou ni Idonda Otokotachi
エンジニール : 鉄道に挑んだ男たち · えんじにーる : てつどう に いどんだ おとこたち
est. Rough estimate based on volume count, reprints and magazine — not an official figure
Overview
In Japan during the Meiji era, various private railway networks were engaged in a fierce battle to control the development of the railways. Against this backdrop, engineer Yasujiro Shima, head of the Kansai Railway Department, and the prodigious but stubborn driver Tetsundo Amamiya both aspired to take the railways to new heights, convinced that the future of the country depended on it. (Source: Kotodama, translated)
Source: AniList
External databases: AniList · Wikidata
How to compare editions, collected volumes and ISBNs / Sources, updates and corrections