Tetsujin 28 vs Black Ox, the Kaiyodo Diorama Showa Fans Recognize

Tetsujin 28 vs Black Ox — Time Slip Glico B&W Kaiyodo Diorama

Where Tetsujin 28 Sits in the Robot Anime Timeline

Tetsujin 28 began as a manga by Yokoyama Mitsuteru, serialized in the Japanese boys’ magazine Shonen from 1956. The story centers on Shotaro Kaneda, a young detective who controls a towering robot via remote control; Tetsujin himself was originally built as a military weapon and repurposed for justice. The television anime, produced by TCJ (later renamed Eiken), aired from 1963 as a black-and-white series running 96 episodes. In 1964, it reached North American screens under the title Gigantor, making it one of the earliest Japanese animated series to air in the United States.

Black Ox, the villain robot depicted alongside Tetsujin in this diorama, was built by the antagonist Big Fire specifically to defeat him. The two robots contrast visually in an immediately readable way: Tetsujin is rounded, with distinctive ear-like protrusions on his helmet, while Black Ox is angular and horned. Their confrontations are central to the series, which is what makes them natural subjects for a face-off diorama.

Tetsujin 28 is widely recognized as one of the founding works of the giant robot genre. The template it established — a massive, remotely operated super-robot as the narrative core — fed directly into later series including Mazinger Z, Getter Robo, and eventually Mobile Suit Gundam. For collectors interested in the ancestry of mecha, Tetsujin 28 is the point where that lineage begins.

Time Slip Glico, Kaiyodo, and the Food Toy Tradition

Ezaki Glico has bundled bonus toys with its confectionery since around 1927, one of the oldest such programs in Japan. Time Slip Glico, launched in the early 2000s, applied that tradition to a dedicated collectible series: hard plastic figures packaged with candy, focused on Showa-era nostalgia — characters and scenes from roughly the 1955–1975 period. This format is known in Japanese as shokugan, or food toy. Buyers typically don’t know which figure they’ll receive until the package is opened, a blind-box structure that generates set-completion demand among collectors.

Sculpting for the Time Slip Glico series was handled by Kaiyodo, a Japanese figure and model manufacturer active since the 1960s and regarded internationally for the precision of its work across food toys, capsule toys, and limited-edition figures. The Glico-Kaiyodo collaboration drew attention at the time specifically because it raised the craft standards of what had previously been considered simple novelty inserts — the omake, or bonus toy — well beyond what that format had offered before.

The Monochrome Theme and What It References

The B&W palette is not a stylistic choice made at random. The original 1963 Tetsujin 28 anime was broadcast in black and white, and this sub-line treats that broadcast context as its explicit reference point. Tetsujin appears with a black body and silver accents; Black Ox in grey with darker striping and black rings at the wrists. Rather than applying the colors associated with later adaptations, the figures stay within the tonal range that defined the show as viewers first encountered it.

The diorama format itself is worth noting. Rather than a single character, this set places both robots in a face-off on a hexagonal textured base, with a streetlamp accessory completing the scene. That compositional self-sufficiency — two adversaries, a shared base, one setting detail — gives the piece a narrative quality that single-character figures don’t carry in the same way, and it’s consistent with why this subject was chosen for a diorama rather than individual releases.