Seiya Ōuchi

Born in 2006 in Higashi-Matsushima, Miyagi — a coastal town in Tohoku that got hit hard by the 2011 earthquake — Seiya Ōuchi is barely into his twenties and already chasing a professional baseball dream. There's something quietly compelling about a kid from that part of Japan putting in the reps every day at Nihon Wellness Miyagi High School, far from the spotlight, just grinding. The details on his stats and career arc are sparse at this point, and honestly that's kind of the whole thing — he's still in the "nobody knows yet" chapter, which is exactly when I find athletes most interesting to watch. A Pisces born in the year of the Dog, so the astrology crowd would say he's got both the dreamer and the loyal, dig-in-and-endure energy. I don't know if the ceiling is NPB starter or something bigger, but I'm rooting for the Tohoku kid to make some noise.

Seiya Ōuchi is a Japanese baseball player born on March 9, 2006, in Higashimatsushima, Miyagi Prefecture. He attended Japan Wellness Miyagi High School, where he pursued his baseball career. Still a teenager as of 2024, he represents an emerging generation of players from the Tohoku region.

Name (English)

Seiya Ōuchi

Name (Japanese)

大内誠弥

Reading

おおうち せいや

Born

March 9, 2006 (age 20)

Zodiac / Chinese zodiac

Pisces / Dog (戌)

Origin

Higashimatsushima, Miyagi Prefecture, Japan

Occupation

Baseball Player

High school

Japan Wellness Miyagi High School

Motto

Private

• Instagramhttps://www.instagram.com/o_seiya67/
• Wikipedia (Japanese)https://ja.wikipedia.org/wiki/%E5%A4%A7%E5%86%85%E8%AA%A0%E5%BC%A5

Tags

• From Miyagi Prefecture
• Baseball Player

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.