1. Toba M (2004) The decline of Manila clam stock in Tokyo Bay. Bull Fish Res Agency Suppl 1:13–18
2. Kakino J (1986) The cases of accidental mortality of shellfish in Tokyo bay, especially on the influence of anoxic sea water. Fish Eng 23:41–47 (in Japanese with English abstract)
3. Yamashita T (1988) Abnormal mass mortality caused by river flood during rainy season. Bull Seikai Reg Algae Shellfish Assoc 5:61–64 (in Japanese with English abstract)
4. Kakino J, Toba M, Kaneko A, Miyata Y (1992) Characteristics in winter mortality of Manila clam in Kisarazu, Tokyo Bay. Bull Chiba Prefect Fish Exp Stn 50:21–30 (in Japanese)
5. Kakino J (2006) Study on the effects of physical and chemical environmental factors on the Japanese little neck clam Ruditapes philippinarum. Fish Eng 43:117–130 (in Japanese with English abstract)