Koichi Yamadera is a Japanese actor, narrator and singer from Shiogama, Miyagi Prefecture. He graduated from Tohoku Gakuin University's economics school and is currently affiliated with Across Entertainment. Before that, he was affiliated with the Tokyo Actor's Consumer's Cooperative Society.
| Date of Birth | 17th June 1961 |
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| Age | 63 Years |
| Zodiac Sign | Gemini |
| Country | Japan |
| Current City | Shiogama |
| Birth Place | Shiogama |
| Nationality | Japan |
| Citizenship | Japan |
| Spouses | Mika Kanai Rie Tanaka Robin Shoko Okada |
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| Education |
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| Tohoku Gakuin University |
| Occupation | actor, singer, tarento, voiceover artiste, radio personality, seiyū |
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| Awards |
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