The Story Behind Japan’s Saikyo-O Zukan Sphinx Choco Egg

Sphinx Secret Choco Egg — Saikyo-O Zukan Selection Vol.3

Inside the Saikyo-O Zukan Franchise

Saikyo-O Zukan — roughly “Ultimate King Encyclopedia” — is a Kodansha book series aimed at elementary-school children in Japan. The premise is direct: pick two or more creatures, real or mythological, and determine who would win. Each volume tackles a different theme — dinosaurs, insects, ancient life, space, legendary beasts — pitting them against one another with illustrated stats and match-up scenarios. The series grew steadily through the 2010s and eventually crossed into merchandise: stationery, toys, and food toys. The “Selection” sub-line draws from multiple existing volumes rather than staying with a single theme, though the specific subjects featured in Vol.3 cannot be confirmed from publicly available information.

What a Choco Egg Actually Is

Shokugan — “food toy” — is a Japanese category in which candy comes packaged with a miniature figure. The Choco Egg format, associated with Osaka-based Furuta Confectionery (though confirming the manufacturer definitively requires the original packaging), became one of its most recognizable forms when it appeared around 1999. The structure is layered: a chocolate shell surrounds a small capsule, which contains a fully assembled figure — no construction required. The format expanded across dozens of themes over the years, covering natural science, animals, anime properties, and eventually licensed book IP like Saikyo-O Zukan.

The secret designation refers to a figure absent from the official lineup — an undisclosed variant slipped into the production run without announcement. Identifying a secret figure typically depends on collector community knowledge rather than packaging. The translucent blue plastic seen here is a recognized visual cue for this kind of hidden variant, a deliberate contrast from the standard painted figures in the same set — though without the original packaging, this identification is a strong inference rather than a confirmed specification.

The Sphinx as a Mythological Subject

Within Saikyo-O Zukan, the Sphinx fits into what the series treats as the mythological heavyweight category — ancient creatures from world legend measured against each other and against real animals. This figure depicts a winged, human-faced sphinx in a seated posture with wings spread wide behind it. That design aligns with the Greek sphinx — human face, lion body, large wings — rather than the wingless Egyptian stone version. The Greek sphinx is the one tied to riddles, a creature said to destroy travelers who failed to answer correctly, until Oedipus finally did.

For collectors outside Japan, the Sphinx motif needs no introduction. It sits at the intersection of two ancient civilizations’ imaginations and carries immediate visual recognition across cultures. The translucent blue material adds a quality that painted figures lack: light passes through it differently, giving the sculpt an otherworldly character that suits a mythological subject well. The Saikyo-O Zukan series itself remains largely unknown internationally, but Japanese food toys featuring world mythology have found a growing audience among collectors drawn to Japan’s distinctive approach to small-scale figures.