Goma-chan from Goma-chan series
Totoro from My Neighbor Totoro
Slime from Dragon Quest series
A rabbit reaching over 2 cups
Here are samples of Yamamoto's earlier 2D art:
Eren Jaeger from Attack on Titan
Marill from Pokémon
Amaterasu from Okami
Sanji's mugshot from One Piece
You can see the rest of the 2D pics at the source.
Why can't I be this talented with my milk and coffee? And I totally don't know how I should tag this...