However, during peacetime when war did not exist for a long time, the roles of suigun navy were only to control the marine traffic in the domain or to offer the ship when their lord patrolled their domain and took a boat trip for sankin-kotai (daimyo's alternate residence in Edo).
だが、戦争の絶えて久しい平和な時代にあっては領内の海上交通を管理したり、領内巡察や参勤交代などで大名が船旅するときに船を出したりする程度の役割でしかなかった。