Born to a poor farming family in Tōgū village, Watarai district, Ise Province (now Minamiise, Mie). His given name is said to have been Yoshimichi and his common name Shichibei, among others; he later took the name Zuiken. There was little work in the village, and the boy had to look early for a way to make his own living.
As a boy he went to Edo and worked as a cart puller and at other jobs. There is a story that he gathered the cucumbers and eggplants floated down rivers at the Obon festival, pickled them and sold them to workers at building sites to raise his first capital. His knack for growing a business through small ideas was the root of his later success.
When the Great Fire of Meireki burned most of Edo, Zuiken is said to have hurried at once to Kiso (Nagano) to buy up mountain timber. With the burned city needing to be rebuilt, the price of timber soared, and Zuiken made a great profit and became known as a timber merchant.
From around this time he took on civil engineering and building work for the shogunate and daimyō and became one of the leading merchants of Edo. Through these works he came to know shogunal officials and built up knowledge and experience of transport routes and river works, and his ability came to be recognized.
The shogunate ordered him to devise a way to ship tax rice from its lands in Mutsu (Fukushima) to Edo. Shipping rice by boat then took a long time, and much rice was often lost on the way. Zuiken personally surveyed the sea lanes and ports and planned a safe and fast route.
He set up the eastern sea route, running south along the Pacific from the mouth of the Abukuma River, around the Bōsō Peninsula and via ports such as Shimoda in Izu into Edo. He fixed ports of call along the way and set rules for watching over ships and handling procedures, so that rice could be shipped safely and quickly.
Next, to ship rice from shogunal lands in Dewa (Yamagata), he set up the western sea route from Sakata south along the Sea of Japan, through the Inland Sea via Shimonoseki to Osaka, and on around the Kii Peninsula into Edo. This route later became the path of the kitamaebune trading ships and greatly changed the flow of goods across the country.
On the shogunate's orders he took charge of flood-control work on the Yodo River in Osaka, cutting through Kujō Island to open a new channel (later the Aji River) to improve the flow. This reduced flooding in Osaka and made it easier for ships to come and go. The work took several years and supported the growth of Osaka.
In recognition of his many years of service, he was raised from the townsman class to become a hatamoto, a direct retainer of the shogunate. That a boy born to a farming family who came to Edo with nothing should, by his own wits and effort, become a vassal of the shogunate was rare even in that age.
He died in Edo. The eastern and western sea routes he opened became the main arteries of Japan's distribution of goods in the Edo period, supporting an economy in which rice and goods moved throughout the country. Arai Hakuseki recorded Zuiken's work on sea routes and river control in writings such as the Ōu Kaiunki, passing his achievements on to later generations.
Tokugawa IemitsuNakae TōjuHoshina MasayukiNonaka KenzanKumazawa BanzanAmakusa ShirōMitsui TakatoshiYamaga Soko
People of the Edo period ・ People by period
Based on facts found in textbooks and biographies. Uncertain points are marked as such.