The "Reimei workshop on in-medium modification of vector mesons @ Yonsei" will be held on March 8 - 10, 2026, on-site at Yonsei University, Seoul, South Korea. The workshop will focus on topics related to the experimental/theoretical study of vector meson modifications at finite density and/or temperature. With the J-PARC E16 experiment starting its physics measurements in 2026, with the goal of determining the phi meson properties in nuclear matter, the workshop will attempt to provide an overview on the current status of the field.  We hope to create a relaxed atmosphere at the workshop