Japanese erasers are also know as "Japanese puzzle erasers" and "Japanese take apart erasers". Search "Japanese erasers" and at the bottom of that page you will see those terms.
We have seen in our store, over and over again children tearing into newly bought Japanese erasers to see how they come apart.
We have always wished that there was more interchangeability with the Japanese erasers. You could not mix and make horrendous color combinations. Now with the new dog Japanese erasers that is possible. We can not wait for the green and yellow Japanese baby erasers.