• Professional ice hockey leagues in Japan(1 C, 1 P)

J

• J.League(11 C, 19 P)

N

• Nippon Professional Baseball(12 C, 14 P)

X

• X-League (Japan)(3 C, 1 P)

A

• Asia Winter Baseball League

B

• B.League
• Baseball Challenge League

C

• Central League
• Comparison of Major League Baseball and Nippon Professional Baseball

E

• Eastern League (Japanese baseball)

F

• F.League

J

• J.League
• J1 League
• J2 League
• J3 League
• Japan Diamond Softball League
• Japan Handball League
• Japan Rugby League One
• Japan Women's Baseball League

M

• Miyazaki Phoenix League

N

• Nadeshiko League
• Nippon Professional Baseball

P

• Pacific League

S

• Shikoku Island League Plus
• Professional sumo divisions
• SV.League

T

• T.League
• Top Challenge League

V

• V.Challenge League
• V.League (Japan)

W

• WE League
• Western League (Japanese baseball)
• Women's Japan Basketball League