| Hokkaido Region |
| Hokkaido Students Baseball League |
1990 |
8 |
8 |
0 |
- |
- |
This league isn’t a fixed league, there are no teams in 2nd division for now |
| Sapporo Students Baseball League |
1990 |
18 |
6 |
6 |
6 |
- |
|
| Tohoku Region |
| North Tohoku University Baseball League |
1991 |
16 |
6 |
6 |
4 |
- |
|
| Sendai Big 6 University Baseball League |
1969 |
6 |
6 |
- |
- |
- |
|
| South Tohoku University Baseball League |
1991 |
6 |
6 |
0 |
- |
- |
This league isn’t a fixed league, there are no teams in 2nd division for now |
| Kanto-Koshinetsu Region |
| Chiba Prefecture University Baseball League |
1952 |
17 |
6 |
6 |
5 |
- |
|
| Kankoshin Students Baseball League |
1993 |
20 |
10 |
10 |
- |
- |
2nd division is split by West and East regional part (5 teams each) |
| New Tokyo University Baseball League |
1958 |
24 |
6 |
6 |
6 |
6 |
|
| Tokyo Big 6 University Baseball League |
1925 |
6 |
6 |
- |
- |
- |
|
| Tohto University Baseball League |
1931 |
22 |
6 |
6 |
6 |
4 |
|
| Shuto University Baseball League |
1964 |
16 |
6 |
10 |
- |
- |
|
| Kanagawa University Baseball League |
1949 |
12 |
6 |
6 |
- |
- |
|
| Hokuriku-Tokai Region |
| Aichi University Baseball League |
1949 |
26 |
6 |
12 |
7 |
- |
2nd division split into A & B part with 6 teams each part, 3rd division has 7 teams now |
| Tokai Region University Baseball League |
1975 |
20 |
8 |
7 |
5 |
- |
Consist of three prefectural leagues (from left to right): Shizuoka, Gifu and Mie |
| Hokuriku University Baseball League |
1968 |
12 |
6 |
6 |
- |
- |
|
| Kansai Region |
| Kansai Big 6 (students) University Baseball League |
1982 |
6 |
6 |
- |
- |
- |
|
| Kansai 6 University Baseball League |
1982 |
6 |
6 |
- |
- |
- |
|
| Hanshin University Baseball League |
1982 |
18 |
6 |
12 |
- |
- |
2nd division split into West and East part (6 teams each) |
| Kinki Students Baseball League |
1982 |
18 |
6 |
6 |
6 |
- |
|
| Keiji University Baseball League |
1982 |
12 |
6 |
6 |
- |
- |
Keiji is a combination of two words’ first kanji: Kyoto’s Kyo & Shiga’s Shi |
| Chugoku-Shikoku Region |
| Hiroshima Big 6 University Baseball League |
1967 |
6 |
6 |
- |
- |
- |
|
| Chugoku Region University Baseball League |
1974 |
20 |
6 |
6 |
8 |
- |
|
| Shikoku Region University Baseball League |
1981 |
13 |
6 |
7 |
- |
- |
|
| Kyushu Region |
| Kyushu Big 6 University Baseball League |
1957 |
6 |
6 |
- |
- |
- |
|
| Fukuoka Big 6 University Baseball League |
1971 |
6 |
6 |
- |
- |
- |
|
| Kyushu Region University Baseball League |
1952 |
14 |
6 |
8 |
- |
- |
|
| Southern Kyushu University Baseball League |
2025 |
17 |
4 |
4 |
4 |
5 |
A split-off league out of Kyushu Region league consists of prefectural leagues (from left to right: Kumamoto, Miyazaki, Kagoshima, Okinawa) |