SL / SW, SW / SH and SL x SW / SH were used to analyze as morphologicalparameters .The morphological characteristics of the clams showed significantdifferences between the two populations of Taishi clam and Japanese clam(P <0.05). It is Indicating that the clamsfrom the Taishi and Tokyo Bay, Japan, belongedto two populations groups. There have 4 times breeding to get 24.78 million sedimentlarvae in 8 times of breeding program. According the different breeding time oflarvae stocking in 4 nursery pond. One of 4 nursery ponds what was stocked thebreeding larvae from end of May. The larvae can be screened with 64.0 mm2 ofScreening to be the fastgrowth of clam seedlings as the future seed culture. The harvest of clam is atotal of 19.76 kg about 18000individual. The clam has average body length 11 ± 0.3 mm, the average weight of 1.1 ± 0.8g. The other 3 nursery ponds continuedto be cultured until Screening.