Tsuyoshi is the strongman of the group; he pilots the Yellow Lion, and wears a yellow uniform. He is roughly 22-24 years old. He may look tough and mean, but he has a soft heart, especially when it comes to children. He is never late for a meal. Though his friends tease him about his appetite, Tsuyoshi is very muscular. &quot;Seidō&quot; is a Japanese word for &quot;copper.&quot; 

Golion, a powerful sentient robot, abuses his great powers by attacking and killing creatures known as Deathblack Beastmen, boasting that no one could defeat him. A divine space being punishes Golion for his arrogance and abuse by seperating him into 5 different lion robots. In the year 1999, a group of 5 young men return to Earth after a space voyage, only to find it ravaged by nuclear war. After encountering the alien race known as the Galra, the 5 youths end up on the planet Altea, and learn that the 5 lion robots that Golion was split into are in hibernation in various parts of Altea. Somehow, they must reunite the lions and form Golion, the only hope for the human race.

1997 Daegyo Broadcasting Voice actor in Korea

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Affiliated with 81 Produce.

Tsuyoshi Seidou