Japanese Championship
- AWA Japan Women's Championship
- All Japan Bobsleigh Championships
- All Japan Championship (9-Ball)
- All Japan Road Race Championship
- All Japan Sports Prototype Championship
- All-Japan (disambiguation)
- All-Japan Artistic Gymnastics Championships
- All-Japan Formula Three Championship
- All-Japan Judo Championships
- All-Japan Rugby Football Championship
- F4 Japanese Championship
- Japan Championships in Athletics
- Japan Figure Skating Championships
- Japan LPGA Championship
- Japan Open Championship (disambiguation)
- Japan Open Golf Championship
- Japan Open Tennis Championships
- Japan PGA Championship
- Japan Series
- Japanese Chess Championship
- Japanese Heavyweight Championship
- Japanese National Badminton Championships
- Japanese National Road Race Championships