This is anpan, sweet azuki bean bread, a long time popular kashipan (Japanese cake-bread). Maybe one of the oldest.
Did you know this guy ? It’s Anpanman. He is to anpan what Superman is to supermarkets.
Make little balls of sweet bread : sourdough, flour, egg, butter (not too much), rice bran, very little sugar… Kiki, my home-bakery did that well.
Anko (sweet azuki beans), the simplest version : frozen azuki, kurozato black sugar, a little brandy, vanilla.
The Japanese versions are often made of koshian (pasted beans) way much sweeter. The bread is also richer (fatter and sweeter) and extremely soft. Mines are not like bread. Slightly healthier too. I love this little snack.