Fresh seafood is very big in Japan, and it doesn't get fresher than when you collect it yourself. These live clams were collected in Ise Bay by the uncle of the family I stayed with as an exchange student in 1989. We used them in miso soup and spaghetti vongole, it sure beats the canned or frozen variety you would get in most Italian restaurants here in the UK.
While I was staying with the family, and whenever I have visited since, uncle Jouji would often bring some fresh food over. He lives just out of town, and is retired so has plenty of time for gardening, fishing and gathering shellfish.