Dojima Rice Market: Receipts, Accounts and the Movement of Prices

In Edo-period Osaka, a sale at the rice market did not always involve moving and handing over the physical bales. Promises of exchange and entries in accounts could circulate instead.

Two mechanisms must be distinguished. Shomai involved trading rice receipts, while choaimai involved account transactions referenced to a representative rice brand. Describing both simply as paper trading hides that difference.

The useful questions are what was sold, what changed hands and how the obligations were settled. Starting with those questions connects the waterfront’s rice to the receipt and then to the account book.

Possessing collected rice was different from possessing funds available for payments. The sale process helped domains meet expenses and purchase what they required.

Rice in the compounds was sold by bidding to brokers, with successful buyers receiving rice receipts. Japan Exchange Group describes the receipt as a security promising exchange for rice, rather than a delivery note confirming a completed shipment.

A transferable piece of paper thus stood between the seller and the rice that could be received. A claim could change hands without a fresh rearrangement of bales every time the receipt was resold.

In shomai, the seller delivered a rice receipt and the buyer paid for it. The immediate object passing between them was the receipt carrying the promise of exchange for rice.

That helps explain why the transaction is described as spot trading even when no large bale was passed across the market at that moment. Trading a receipt and collecting rice at the warehouse were distinguishable stages.

The holder of the receipt changed. This transfer of a rice-related claim provides a practical contrast with choaimai, where a particular receipt was not necessarily acquired at the close of the trade.

Settlement of differences is another key to choaimai. A difference between sale and purchase prices could be settled in money through the accounting of opposing transactions, rather than by transferring an entire quantity of rice.

Price movement could create a receiving side and a paying side. Paper and accounting did not make the mechanism a guarantee that every participant would gain.

Shomai’s exchange of a receipt for payment and choaimai’s settlement of price differences coexisted. Their different functions help explain why Dojima was more than a place where physical rice accumulated.

Customers outside Osaka needed information about Dojima’s prices. People called joya gathered market information, made it into letters and sold it; the letters could also contain reports on harvest conditions.

Rice-market couriers specialized in carrying such reports. The organization of departures and their relationship to trading occasions mattered alongside the speed of an individual runner. Flag signalling also conveyed prices.

The account keeps these forms of communication distinct and does not transfer later measured speeds unchanged into earlier periods. Rice-laden boats and information-bearing paper followed different routes while connecting the same commercial world.

The rice market associated with Yodoya’s premises is described as moving to Dojima around 1697. In 1730, under Yoshimune, the government officially recognized shomai and choaimai. Recognition was not the first moment anybody sold rice.

The National Diet Library follows later changes: prohibition in 1869, revival as a rice exchange in 1871 and abolition under the rice-distribution control system in 1939.

The present monument and library materials help orient the history without making every later building an image of the market in 1730. Institutions, trading arrangements and the surrounding city changed over time.