A delegation from Zuse Institute Berlin and Open Grid Europe visited the premises of the Yokohama Research Laboratory of Hitachi Ltd. in the course of a trip to Japan to the 4th International ISM-ZIB-IMI MODAL Workshop on Mathematical Optimization and Data Analysis. In addition to presentations of research topics at Hitachi in supply chain optimization and water network optimiation, the presentation of the latest results in railway optimization both at Hitachi and at MODAL's RailLab was of particular mutual interest. A party in the evening provided ample opportunities to discuss these findings and explore collaboration opportunities.