Onitora, the director of the International Secret Police Agency, looked forward to making his favourite son Takeshi a top-notch criminal investigator. Takeshi was given Spartan training, which turned him into an all-around sportsman as well as martial arts expert. However, Takeshi's attitude toward crime-fighting was so incompatible with his father's that the furious Onitora disowned him. For a while Takeshi investigated crime as a lone wolf; then he became a private detective's assistant and general handyman. Secretly, however, Takeshi obtained from a scientist a new artificial polymer, polimet, that was far stronger than steel. With this polimet Takeshi transformed himself into Hurricane Polimar, an invincible costumed hero.

Source: tatsunoko.co.jp/Works/English/Box03.html#5

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Alternative version: Shin Hurricane Polymer