There are 7 Japanese MLB players played for the Saitama Seibu Lions

Shogo
Akiyama

OF Cincinnati Reds

(Saitama Seibu Lions, Cincinnati Reds)

秋山翔吾 (あきやま・しょうご)

Bats: L Throws: R

Current Age 33

6-0, 190lb (183cm, 86kg)

MLB Debut:
2020-07-24 (32)

Yusei
Kikuchi

LHP Seattle Mariners

(Saitama Seibu Lions, Seattle Mariners)

菊池雄星 (きくち・ゆうせい)

Bats: L Throws: L

Current Age 30

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

MLB Debut:
2019-03-21 (27)

Kazuhisa
Makita

RHP San Diego Padres

(San Diego Padres, Saitama Seibu Lions, Tohoku Rakuten Golden Eagles)

牧田和久 (まきた・かずひさ)

Bats: R Throws: R

Current Age 36

5-10, 181lb (178cm, 82kg)

MLB Debut:
2018-03-30 (33)

Daisuke
Matsuzaka

RHP Boston Red Sox

(Saitama Seibu Lions, Boston Red Sox , New York Mets, Fukuoka SoftBank Hawks, Chunichi Dragons)

松坂大輔 (まつざか・だいすけ)

Bats: R Throws: R

Current Age 40

6-0, 205lb (183cm, 92kg)

MLB Debut:
2007-04-05 (26)

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 45

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

MLB Debut:
2004-04-06 (28)

Micheal
Nakamura

RHP Minnesota Twins

(Minnesota Twins, Toronto Blue Jays, Hokkaido Nippon Ham Fighters, Yomiuri Giants, Saitama Seibu Lions)

マイケル中村 (なかむら・マイケル)

Bats: R Throws: R

Current Age 44

5-10, 170lb (178cm, 77kg)

MLB Debut:
2003-06-07 (26)

Kazuhisa
Ishii

LHP Los Angeles Dodgers

(Tokyo Yakult Swallows, Los Angeles Dodgers, New York Mets, Saitama Seibu Lions)

石井一久 (いしい・かずひさ)

Bats: L Throws: L

Current Age 47

6-0, 215lb (183cm, 97kg)

MLB Debut:
2002-04-06 (28)