For this reason, the toshi made frequent trips between Kamakura and Kyoto in important political developments, such as accession of a new Emperor (appearing frequently in documents such as "Masukagami" (The Clear Mirror) that records activities in the Imperial Court at that time).
従って、皇位継承などの政治的に重要な局面では東使が鎌倉と京都を往復する事が度々あった（『増鏡』など当時の朝廷の動きを記した書物には度々登場する）。