Tadashi Kosaka

Tadashi Kosaka is a jockey — and honestly, that alone puts him in a category that most people sleep on. Born in 1983 in Hyogo, right in the heart of the Kansai region where horse racing culture runs deep, he's part of a world that demands an almost monastic level of discipline: the brutal weight cuts, the early mornings, the sheer trust you have to build with an animal that outweighs you by half a ton. The spotlight in horse racing lands on a handful of famous names, and everyone else is just out there doing the work, lap after lap, season after season. There's something genuinely admirable about that — choosing a craft this demanding and sticking with it.

This take was written by generative AI, one per person, from publicly reported facts (editorial policy). It is a reading of the record, not reporting.

Tadashi Kosaka is a Japanese jockey born on February 7, 1983, in Hyogo Prefecture. He has built his career in professional horse racing. Most personal details, including his agency and active period, have not been disclosed publicly.

Name (English)

Tadashi Kosaka

Name (Japanese)

小坂忠士

Reading

こさか ただし

Born

February 7, 1983 (age 43)

Origin

Hyogo Prefecture, Japan

Occupation

Jockey

Zodiac / Chinese zodiac

Aquarius / Boar

• Wikipedia (Japanese)https://ja.wikipedia.org/wiki/%E5%B0%8F%E5%9D%82%E5%BF%A0%E5%A3%AB
• Wikidatahttps://www.wikidata.org/wiki/Q11459412

Tags

• From Hyogo Prefecture
• Jockey

Last updated

September 18, 2026

Facts are limited to publicly available information up to 2024; non-public or unconfirmed items are omitted. English text is machine-assisted (facts translated by Sonnet, "My Take" written by Opus 4.8). The Japanese page is the source of record.