During the Edo period too, bridges were not built across major rivers for military and political reasons, and the government not only issued the national isolation policy (Kaikin Policy - the policy to forbid private people to trade with foreign countries) and the ban on production of large ships (a part of Buke shohatto - Laws for the Military Houses), but also prohibited distribution using vehicles such as horse- or cow-drawn buggies on Kaido (road) to protect Edo.
江戸時代においても軍事的・政治的理由として大きな河川には橋はかけられず、鎖国（海禁政策）や大船建造の禁（武家諸法度の一部）が出された他、江戸防衛を理由に街道筋の牛馬車など車両使用した物流を禁じる方針を採った。