Price formation of fish in landing market was studied in Japan to examine price discounts of fish species regularly landed in small quantity. It is often told that buyers tend to offer low bidding prices for fish which have small landing amount in a day because handling and shipping costs are fixed regardless of the amount of fish up until certain threshold amount. Prices of john dory (Zeus faber) were collected in 10 small fishing ports through a local fishery cooperative association. The data include everyday prices and landing amounts from January 1 to December 31, 2014. John dory are harvested constantly throughout the year by gillnet, set-net, or line and pall fisheries. The landing amounts per port were less than 100kg per day in most days. Regression analyses were conducted to examine the relationship between prices and the landing amounts. It was found that, when the daily landing is less than 17kg, fish price tends to be lower. In other words, lower supply does not lead to higher price of the fish. Buyers’ low bidding prices were confirmed for fish which have small landing amount is confirmed. It can be argued that, because john dory is not the main target species of fishers (because of small market size and low interest of this fish species by general consumers), such buying practice may happen.