Masahiko Ishikawa, an editor at Shogakukan for manga artist Naoe Kikuchi, mirrors Hirohiko Yokomi's deep passion for trains and railway culture. He originated the project by recruiting Kikuchi to document Yokomi's travels, framing it as an opportunity involving a travel writer while withholding Yokomi's identity and exclusive railway station fixation. Ishikawa actively accompanies Yokomi and Kikuchi on their journeys, frequently endorsing Yokomi's precise train timetables, station-count objectives, and ambitious schemes like navigating six rural areas around Tokyo using one 130-yen ticket. His ongoing participation strengthens the dynamic where Kikuchi feels pressured to persist despite her disinterest in trains, as Ishikawa consistently supports and advances Yokomi's railway-focused methods. He remains a constant presence across the documented travels in the original manga and its adaptations.