I've seen these very cute squeak toys before... I won this lot through Yahoo Japan. They do look a bit dingy and needing a thorough cleaning.
These three cuties, a bear, cat, and a bunny are complete. Also, made by IWAI Co. Japan. There is no year on them. Just adorable, the yellow bear is holding a train, the white bunny is holding her dolly, and the silly pink cat is quite unique, doing a hand stand.