Japanese Children Figurines - Distinct Marks

Hello Board Friends! I'm hoping someone might recognize the mark on the back of these cold painted satin finished figurines. Each figurine is about 3" tall. They are marked on the back with what looks like a three lobed leaf in a circle. One has the letter y and the number 3 below the circle. The other has the letter y and the letter s below the circle. In addition, one is marked 37/31 and the other is 39/32. I'm assuming they were made between the wars. I've visited Gotheborg without success but thought they the mark was distinctive enough that someone might have come across it before. As always, your time and help are much appreciated. Thanks in advance.
Don

 

those are actually kinda sweet !!!

 

Thank you, komo. They're not my usual taste but seemed unusual enough to explore. The stark white complexion is a little spooky but you gotta love the bunny ears!
Don