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Kaichi Masu

桝嘉一 / ます かいち

Japanese baseball player and umpire of the Showa era

March 8, 1908 – December 18, 1981 ・ Kyoto City, Kyoto Prefecture, Japan

  • From Kyoto Prefecture
  • Baseball Player
  • Baseball Umpire

My Take

Kaichi Masu is the kind of figure who quietly keeps baseball history honest — born in Kyoto in 1908, he did the rare double shift of playing the game and then stepping back to officiate it. That transition from player to umpire is genuinely fascinating to me; most guys who love the sport want to stay in the spotlight, but there's something admirable about choosing the role where nobody claps for you and everyone argues with you. He lived through the entire formative era of Japanese professional baseball, from its scrappy prewar beginnings right through the postwar boom, and passed away in 1981 — so he basically got a front-row seat (or, well, a spot on the field with a chest protector) for all of it. The records on him are sparse, which honestly fits the umpire archetype: the game couldn't happen without them, but history tends to forget their names anyway. I find that a little poignant.

Overview

Kaichi Masu (March 8, 1908 – December 18, 1981) was a Japanese baseball player and umpire born in Kyoto City, Kyoto Prefecture. He pursued a career both as a player and later as an umpire, spanning the formative era of professional baseball in Japan. He passed away in December 1981.

1. Profile

Name (English)
Kaichi Masu
Name (Japanese)
桝嘉一
Reading
ます かいち
Born
March 8, 1908 – December 18, 1981
Zodiac / Chinese zodiac
Pisces / Monkey (申)
Origin
Kyoto City, Kyoto Prefecture, Japan
Blood type
Private
Height
170 cm
Agency
Private
Active years
Unknown
Occupation
Baseball Player / Baseball Umpire

2. Background

Elementary school
Private
Junior high
Private
High school
Private
University
Private
Debut
Unknown

3. Relationships

Spouse
Private
Children
Private
Parents
Private
Siblings
Private

4. Personality

Motto

Private

7. About this entry

Tags

  • From Kyoto Prefecture
  • Baseball Player
  • Baseball Umpire
Last updated
2026-06-02

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