Thanks. Yes, they are good, even though I prefer my animals without cages. Quite small, even for Kaiyodo standards. They can still be found quite cheaply on the Japanese auction sites.
There were indeed several Asahiyama Zoo releases. TAW lists them very nicely as 1-5, but where do these fit in? My feeling is that they preceded number 1 and that the other sets should be renumbered, but it's just a guess.