Mysterious mochi marshmallow

My mother-in-law bought the mochi marshmallows for my children in a local supermarket. They are about the tastiest mochi marshmallow I have ever tasted. So naturally I tried to find them online so I could buy them again.

But here's the curious thing. I can't find them anywhere online. And I don't mean to buy. I just mean i can't even find information about them anywhere online. Google Lens which was pretty good until about three weeks ago, seems to have gone backwards and I have noticed it isn't very good at product match anymore, so that is not helping my cause. I did find the company online; Kubota Seika Ltd, but they don't have this product listed on their website. It is a mystery.

Perhaps they are trying to establish this product as an exclusive confectionery or maybe it is a test product. I really don't know. But I hope these delicious mochi marshmallows become more prominent, because they really are delicious.  

Have you ever seen them before?