Kind of sad find today

Well here we are in Queenstown it was raining all day,around 2pm we decided to heck with it its only rain so headed to the lake front,this is a very popular spot with tourists,Found quite a number of coins and also a few foreign ones,my son was using the xterra and got a good signal under a tree on the beach,the target turned out be be a what looked like a small parcel btu due to the amount of time it has been in the ground the paper that wrapped it had become soggen,but there aws still a good signal coming from inside the wrapping.

 Pulling the paper off there was another layer and this turned out to be a photo,but unfortunatly the picture had completed faded,inside this wrapping were the two rings in the pic they have japanese names inside them with a date and the words silver.We have done some research on the net but no luck so I guess the next move is off the police.certainly have to wonder how they got there,judging by the date they have been in the ground for 7 years.....the mind boggles...hopefully we can get them back to the rightful owners....oopps picture of the ring in paper clip is from a previous find