Jumbo Machinder

Jumbo Machinder is the name of a series of large-scale plastic robots sold by Bandai's character toy subsidiary, Popy in the 1970s. Although a trademarked brand name, in common usage Jumbo Machinder is often applied to any large-size robot toy roto molded out of polyethylene terephthalate (PET), a sturdy plastic also used for shampoo bottles. Jumbo Machinders are generally (but not always) 24" in height. After Popy's success with the Jumbo Machinder series, several other Japanese companies, including Takatoku, Nakajima, and Clover began producing large-size plastic robot toys as well. Several of the Jumbo Machinders were retooled for sale in the USA in the late 1970s as Shogun Warriors.

The first Jumbo Machinder, released in 1973, was a portrayal of manga artist Go Nagai's character Mazinger Z, a fictional Super Robot. Originally planned to stand a meter (roughly three feet) tall, the toy was scaled down out of safety concerns. The Jumbo Machinder Mazinger Z sold approximately 400,000 units in its first five months in stores. The second Jumbo Machinder was Kamen Rider V3, the third Ultraman Taro, the fourth Red Baron, and the fifth Kamen Rider X.

Over the years, Popy Toy tinkered with the name and characteristics of the Jumbo Machinder series. In the 1976-1977 period, several characters were released under the "Jumbo Machinder Deluxe" name. Aside from the brand name change, the toys are largely identical aesthetically to their predecessors.

For the 1979-1980 season, the Jumbo Machinders series was re-designed and re-branded as the Kyodai Robotto Kojo ("Giant Robot Factory"). Unlike their predecessors, the Giant Robot Factory toys were sold disassembled, allowing children to bolt the characters together with a simple tool provided in the package. Aside from the fact that they were sold in a disassembled manner and featured more complicated gimmicks (such as spring-loaded shooting fists), the Giant Robot Factory toys feature a very similar aesthetic to their predecessors and are considered by most collectors to be part of the same series.

Giant Robot Factory branded characters include:

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