Mitsui's Echigoya sold kimono at one posted cash price to all comers

Edo-period kimono merchants sold almost entirely on relationship. A merchant carried bolts of fabric to a wealthy patron's estate (yashiki-uri), negotiated a price case by case, and settled the bill in one lump sum every six months or at year's end; the interest implicit in that deferred payment, and whatever margin the merchant could extract in the room, was baked into the price. Getting a fair price, or being served at all, meant already being a regular with standing credit and a personal tie to the seller.

That system quietly priced out everyone without it: ordinary townspeople, newcomers to Edo, anyone who couldn't judge fabric quality or lacked the connections for credit either overpaid or couldn't buy at all without a go-between. The obvious lever — cutting margins for good customers — didn't touch the real barrier, which was that price and access were negotiated privately each time rather than posted for anyone to see and rely on.

Posted one fixed cash price for everyone, no haggling or credit, replacing relationship-gated sales with a walk-in market that anyone could buy from.

Fixed cash price removed need for personal standing or credit, opening buying to anyone with cash.

Excluded population was far larger than existing patrons, so volume offset lower per-item margin.

Posted price made offer legible and trustworthy, reducing uncertainty that kept unconnected buyers away.

When access and price depend on relationships, posting one fixed price for everyone can unlock a much larger market, trading margin for volume.

According to Mitsui's own archives, Echigoya's Edo sales grew roughly fivefold within the policy's first decade, and the store became the largest textile retailer of the period; by 1688 the novelist Ihara Saikaku was already writing a merchant character modeled on Takatoshi's methods.