Seijiro Koyama

Career overview

Role: Meticulous television and film archivist.
Task: Write a 180-260 word career overview of Seijiro Koyama (Directing).
Constraints:
Use ONLY verifiable facts from the provided SYNOPSIS and SOURCES.
No invented titles, names, dates, awards, etc.
Original, neutral, encyclopedic prose.
Plain text ONLY (no markdown, no asterisks, no headings, no bullet points).
Length: 180-260 words.
Structure: 2-3 short paragraphs.
No preamble or JSON.
Name: Seijiro Koyama (also Seijirō Kōyama, Sei).
Birth: July 16, 1941, in Gifu, Gifu Prefecture, Japan.
Education: Attended Nihon University but quit midway.
Early Career: Joined Kindai Eiga Kyokai (independent production company). Worked as an assistant director under Kaneto Shindō, Kozaburo Yoshimura, and Tadashi Imai.
Directorial Debut: 1971 with the children's film Koi no iru mura.
Second Film: Futatsu no hāmonika (1976), which earned him a New Directors Citation from the Directors Guild of Japan.
1983 Film: Hometown, entered into the 13th Moscow International Film Festival.
1987 Film: Hachiko Monogatari (about the faithful dog Hachiko), top Japanese film at the box office that year.
Style/Reputation: Known for his humanistic perspective.
Known Credits: 31.
Paragraph 1: Early Life and Training.
Seijiro Koyama was born on July 16, 1941, in Gifu, Gifu Prefecture, Japan. He attended Nihon University but left the institution midway through his studies to join the independent production company Kindai Eiga Kyokai. During his time there, he served as an assistant director under the direction of Kaneto Shindō, Kozaburo Yoshimura, and Tadashi Imai.
Paragraph 2: Directorial Career and Notable Works.
Koyama made his directorial debut in 1971 with the children's film Koi no iru mura. His second film, Futatsu no hāmonika, was released in 1976 and earned him a New Directors Citation from the Directors Guild of Japan. In 1983, his film Hometown was entered into the 13th Moscow International Film Festival. His 1987 film, Hachiko Monogatari, which tells the story of the faithful dog Hachiko, was the top Japanese film at the box office that year. Known for a humanistic perspective, Koyama has 31 known credits.
Current Word Count Check:
Para 1: ~55 words.
Para 2: ~95 words.
Total: ~150 words.
Target: 180-260 words. I need to expand slightly using only the provided facts.
Expansion Strategy:
I need to be careful not to invent facts. I can elaborate on the details provided in the synopsis.
Draft 2:
Seijiro Koyama was born in Gifu, Gifu Prefecture, Japan, on July 16, 1941. He attended Nihon University but quit midway through his education to join the independent production company Kindai Eiga Kyokai. While working at the company, he served as an assistant director under the guidance of directors Kaneto Shindō, Kozaburo Yoshimura, and Tadashi Imai.

Koyama made his directorial debut in 1971 with the children's film Koi no iru mura. His second film, Fut