There are 3 Japanese MLB players played for the Houston Astros

Yusei
Kikuchi

LHP Los Angeles Angels

(Saitama Seibu Lions, Seattle Mariners, Toronto Blue Jays, Houston Astros, Los Angeles Angels)

菊池雄星 (きくち・ゆうせい)

Bats: L Throws: L

Current Age 33

6-0, 194lb (183cm, 87kg)

MLB Debut:
2019-03-21 (27)

Norichika
Aoki

OF Milwaukee Brewers

(Milwaukee Brewers, Kansas City Royals, San Francisco Giants, Seattle Mariners, Houston Astros, Toronto Blue Jays, New York Mets, Tokyo Yakult Swallows)

青木宣親 (あおき・のりちか)

Bats: L Throws: R

Current Age 43

5-9, 180lb (175cm, 81kg)

MLB Debut:
2012-04-06 (30)

Kazuo
Matsui

2B/SS New York Mets

(New York Mets, Colorado Rockies, Houston Astros, Saitama Seibu Lions, Tohoku Rakuten Golden Eagles)

松井稼頭央 (まつい・かずお)

Bats: S Throws: R

Current Age 49

5-10, 187lb (178cm, 84kg)

MLB Debut:
2004-04-06 (28)