Shiro's mother died of radiation poisoning when he was still a young child. Shiro (吉田 四郎 Yoshida Shirō) was raised by his uncle Tomo to hate the West and seek for a return to Japan's imperial days.
After years of training, Sunfire, wearing a costume that looked like a rising sun, attacked America when the X-Men intervened. The battle ended with Sunfire killing his uncle and returning to Japan. Back in Japan, Shiro found himself a social outcast for having dishonored his father. He fled to Tokyo’s slums and fell in with the criminal Dragon Lord of Krakinowa, who sought to restore Japan’s status as a world power. Sunfire was sent to destroy an American cargo ship, leading to conflict with Namor, who made Sunfire realize the ramifications of his actions and teamed with him to defeat the Dragon Lord. Having redeemed himself, Sunfire was accepted as Japan’s protector.
Earliest Appearances
| Title | Year/Month |
|---|---|
| X-Men #64 | 1970, January |
| Sub-Mariner #52 | 1972, August |
| Sub-Mariner #54 | 1972, October |
| Sub-Mariner #53 | 1972, September |
| Avengers #117 | 1973, November |
| Iron Man #67 | 1974, April |
| Iron Man #69 | 1974, August |
| Iron Man #68 | 1974, June |
| Iron Man #70 | 1974, September |
| X-Men #94 | 1975, August |
| Iron Man #72 | 1975, January |
| Giant-Size X-Men #1 | 1975, May |
| Iron Man #99 | 1977, June |
| Iron Man #98 | 1977, May |
| X-Men #120 | 1979, April |
| X-Men #118 | 1979, February |
| X-Men #119 | 1979, March |
| X-Men #138 | 1980, October |
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