Take a scenic drive up the 339 and you'll eventually find yourself at Lake Jusanko. Park at the shops, walk across the bridge, and pay a mere 300 yen to start your clam hunt. This fee provides a bag for your finds and some colanders to aid your search. The lake is only knee deep (although is appears deeper!), so be sure to wear some half pants. You can keep all the clams you find, so have at it. FYI: the park is open late but the lake for clam pickin' closes around 3:15PM.
The skinny: A fun way to spend a sunny day
Price: 300 yen
Where: Click here for a map
Website: Click Here (see the 5th picture down)