Seven-Eleven Japan cut 70 daily supplier trucks to 9 by sorting deliveries by temperature

When Seven-Eleven Japan opened its first store in 1974, each manufacturer delivered its own goods: a store might be visited by around 70 trucks a day, each from a different maker, each needing to be received, checked and shelved by the store's small crew. For a 100-square-meter shop selling fresh lunchboxes, receiving was swallowing the working day, and each truck ran half-empty on a route serving one supplier's customers.

SEJ inverted the sorting principle. Suppliers handed goods to combined distribution centers serving only Seven-Eleven, which consolidated by temperature band (frozen -20C, chilled 5C, warm rice at 20C, shelf-stable) rather than by manufacturer. One truck carried ice cream from one maker beside frozen food from five others, and dense clustering meant each truck looped through many stores. Under Toshifumi Suzuki the system hardened through the 1980s beside POS-driven ordering; by 2003 the corporate report puts deliveries at 9 vehicle visits per store per day, down from 70 in 1974.

The system survived its sharpest test in November 1988, when NHK exposed mismatches in the production-time labels on convenience-store lunchboxes. Suzuki declared a reset of the manufacturing and delivery setup: dedicated 18C-managed partner factories were selected, the three-times-a-day rhythm locked in, and by February 1989 temperature-banded joint delivery and freshness management stood as an audited system. Distribution control had shifted from makers and wholesalers to the retailer, making freshness and zero stock-outs competitive weapons.

Sort deliveries by temperature, not by maker

Temperature is a property of the goods, not of the maker, so it gives rival suppliers a neutral, operational basis for sharing a truck — no one has to concede who owns the customer relationship.

Combined distribution centers dedicated to one retail chain keep the pooled network accountable for freshness standards that a shared public wholesaler could not enforce.

Dense store clustering (the dominant strategy) gives each multi-maker truck dozens of drop points, so small-lot, high-frequency delivery stays economic.

Fewer receiving events freed store staff for shelf and ordering work, turning logistics reform into store-level productivity.

The deepest efficiencies hide in handoffs between companies, not inside them. Redraw logistics around a property everyone accepts, here temperature, and rival shipments become one network.

Temperature-banded joint delivery became the template for Japanese convenience-store logistics — FamilyMart and Lawson built equivalents, and by 2020 the three chains were even piloting joint delivery across chains. SEJ's network of dedicated combined distribution centers scaled with the store count, and the model's logic (pool by physical requirement, densify the map, let the retailer own the network) spread through Japanese retail as the standard answer to small-store logistics.