The purposes of this paper are to introduce the historical background and price trendsof the imported fishmeal market, and to reveal the pattern of causality between prices in theimported fishmeal market and the market prices of yellowtail and sea bream inlanding areas.Granger causality test was used in this analysis. The results were as follows: 1) there is causality between theprice of imported fish meal andthe market price of sea bream in landing areas, 2) but there isno causality among the marketprices of all combinations without imported fishmeal and sea bream.