However, Yasujiro SHIMA, who was Mantetsu personnel, was an engineer specialized in railway technology, came to promote the 'Bullet train plan,' to be described later, together with his oldest son, Hideo SHIMA.
しかし満鉄関係者には鉄道技術者の島安次郎がおり、その長男の島秀雄と共に後述する「弾丸列車計画」を推し進める事になる。