Masato Kumashiro

There's something quietly compelling about Masato Kumashiro's story — a kid who grew up in Kumakogen, a small mountain town tucked deep in Ehime Prefecture, and turned his whole life into baseball. Imabari Nishi High School is no joke as a baseball program, so just making the cut there says something about his early commitment. He's a 1989 baby, Aries energy, and at 175cm he was never going to be the guy scouts drool over on raw physical tools alone — which honestly makes you respect the grind more. What I find interesting is that he's now on the coaching side too, passing down whatever he figured out over the years on a diamond. That shift from player to teacher doesn't happen unless you genuinely love the game beyond your own career. Not a flashy name, not a household face, but the kind of baseball lifer who keeps the sport's foundation solid.

Masato Kumashiro is a Japanese baseball player and coach born on April 18, 1989, in Kumakogen, Ehime Prefecture. He attended Imabari Nishi High School in Ehime, a school known for its baseball program. Standing 175 cm tall, he has pursued a career both as a player and, in a coaching capacity, working to pass on his knowledge of the game to the next generation.

Name (English)

Masato Kumashiro

Name (Japanese)

熊代聖人

Reading

くましろ まさと

Born

April 18, 1989 (age 37)

Zodiac / Chinese zodiac

Aries / Snake (Mi)

Origin

Kumakogen, Ehime Prefecture, Japan

Height

175cm

Occupation

Baseball player / Baseball coach

High school

Ehime Prefectural Imabari Nishi High School

Motto

Private

• Instagramhttps://www.instagram.com/kumashiro58/
• Wikipedia (Japanese)https://ja.wikipedia.org/wiki/%E7%86%8A%E4%BB%A3%E8%81%96%E4%BA%BA

Tags

• From Ehime Prefecture
• Baseball player
• Baseball coach

Last updated

2026-06-02

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.