The system of pricing that is used by the Tokyo Stock Exchange. Under the Kakaku Yusen system, a lower-priced trade is given priority over a higher-priced trade for a sell order. Conversely, higher-priced trades take pcedence over lower-priced trades for buy orders.
The Kakaku Yusen system serves as a tiebreaker for trades that are received or placed at the same time. This system is complementary to the exchange's other tiebreaker mechanism, which gives priority to an earlier-placed trade when two trades come in at the same price. The Kakaku Yusen system is opposite of how trades are filled on American exchanges.