Yahara's duties chiefly involved overseeing the comings and goings of ships on official shogunate business, or belonging to ''daimyô'' on ''[[sankin kotai|sankin kôtai]]'' journeys, as well as [[Ryukyuan embassies to Edo|Ryukyuan]] and [[Korean embassies to Edo]]; this included providing such ships with drinking water, firewood, and other needed supplies, and overseeing the [[corvee]] of boats and boatmen from neighboring areas, who would be called upon to escort or otherwise aid such elite vessels. | Yahara's duties chiefly involved overseeing the comings and goings of ships on official shogunate business, or belonging to ''daimyô'' on ''[[sankin kotai|sankin kôtai]]'' journeys, as well as [[Ryukyuan embassies to Edo|Ryukyuan]] and [[Korean embassies to Edo]]; this included providing such ships with drinking water, firewood, and other needed supplies, and overseeing the [[corvee]] of boats and boatmen from neighboring areas, who would be called upon to escort or otherwise aid such elite vessels. |