Created by mangaka Shotaro Ishinomori, Inazuman first appeared in the self-titled 1973 tokusatsu TV series, Inazuman. He has become quite unique amongst the superheroes of the Henshin Hero genre. There are plans to release the series on DVD in North American in November, 2008.
First, he performs a henshin pose (crossing his arms in front of his chest) and uttering the phrase, "Gôriki Shôrai!" (剛力招来 - literally "Summon Mighty Power"), he is wrapped in a blue cocoon, which bursts, revealing the creature Sanagiman. He resembles an armored brown larva mutant with a white belt, which has a biomechanical power meter on it.
Then, when Sanagiman gathers enough energy on his belt, he crosses his fists in front of his chest, uttering the phrase, "Chôriki Shôrai!" (超力招来 - literally "Summon Ultimate Strength"), and spreads them aside, with his chest emitting a swirl of colorful energy. Sanagiman's exterior then explodes to pieces, and in his place is Inazuman! He is a moth mutant, wearing the same power belt as Sanagiman, and resembles a blue man with huge colorful oval eyes, feathred lightning-shaped antennas, yellow scarf, black gloves & boots, and yellow lightning-shaped marks that stream down his blue body.
As both Sanagiman and Inazuman, his abdominal fighting cry is "Chest!" (チェスト! - Chesuto!) (as opposed to "Hyaa!" "Tou!" "Eii!" etc.)
NOTE: Inazuman's name is a cross between "inazuma" (a Japanese word for "lightning) and the English word "man". The same is done for Sanagiman ("sanagi" = Japanese for "chrysalis" or "pupa").
Inazuman looked somewhat different than the one from the tokusatsu version (he looked more "naked" and less streamlined, and had a curled probiscus on his forehead), and was even able to grow moth wings out of his back! Sanagiman was slightly different as well.
This series was also featured on TV in Hawaii.