Bear Mammals - Ursidae - Bears | Sakai Eiji | Tanteidan 22nd convention (read full review)
| 125 | Square | Folded by Rui Roda |
Craft glue Objects - Various | Sakai Eiji | Tanteidan 27th convention
| 19 | Square | |
Giraffe Mammals - Giraffidae - Giraffes and Okapi | Sakai Eiji | BOS Convention 2019 Autumn | 53 | Square | Folded by Morgan Lozano Monroy |
Giraffe Mammals - Giraffidae - Giraffes and Okapi | Sakai Eiji | Tanteidan 23rd convention
| 26 | Square | Folded by Morgan Lozano Monroy |
Puppy Mammals - Canidae - Dogs | Sakai Eiji | BOS Convention 2018 Autumn | 98 | Square | |
Sea slug Molluscs | Sakai Eiji | Tanteidan 26th convention
| 185 | Square | |
Skull People - Anatomic parts - Skulls and Skeletons | Sakai Eiji | BOS Convention 2018 Spring | 42 | Square | |
Soft monster Imaginary beings | Sakai Eiji | Tanteidan 24th convention
| 83 | Square | Folded by Wilson Yeung |
Squid Molluscs | Sakai Eiji | Czech Origami Convention 2018-2019
| 160 | Square | Folded by Wilson Yeung |
Squid Molluscs | Sakai Eiji | Tanteidan 24th convention
| 54 | Square | Folded by Wilson Yeung |
Tyrannosaurus Dinosaurs and Prehistoric Animals - Cretaceous - Tyrannosaurus Rex | Sakai Eiji | Tanteidan 25th convention
| 64 | Square | |
Underground logo Symbols | Sakai Eiji | BOS Magazine 307 | 6 | Square | |