| Japan Region | |
| Last Season: | 2023 Little League World Series qualification |
| Formerly: | Far East Region Asia Region |
| Sport: | Baseball |
| Country: |  Japan |
| Champion: | Johoku Little League, Nakano, Tokyo |
| Most Champs: | Chōfu Little League, Chōfu, Tokyo (12) |
Japan first participated in the Little League World Series in 1962. Between 1962 and 2000, Japan participated in the Far East Region of the LLWS. In 2001, the Far East Region was divided into the Asia Region and the Pacific Region. From 2001 to 2006, Japan competed in the Asia Region. In 2007, the Japan Region was created, so that the winner of the Japanese championship receives an automatic berth in the Series.
In 1967, the first All-Japan championship took place.[1] Prior to 1967, Japanese teams participated in the Far East region in each year between 1962 and 1966. In 1969, the Far East Region conducted its first regional tournament, with teams from six nations.
| Year | Champion | City | Runner-up | City | Region | LLWS | Record | |
|---|---|---|---|---|---|---|---|---|
| Misawa | Aomori | Pacific | DNQ | – | ||||
| Kunitachi | Tokyo | Far East | 7th place | 1–2 | ||||
| Gyokusen | Tokyo | Far East | Withdrew | – | ||||
| Tachikawa | Tokyo | Far East | 4th place | 1–2 | ||||
| Arakawa | Tokyo | Far East | 6th place | 1–2 | ||||
| Wakayama | Wakayama | Far East | 4th place | 1–2 | ||||
| All-Japan Championship | ||||||||
| West Tokyo | Tokyo | Osaka Nishi | Osaka | Far East | Champions | 3–0 | ||
| Wakayama | Wakayama | Little Hawks | ? | Far East | Champions | 3–0 | ||
| Chōfu | Chōfu | Little Hawks | ? | Far East | DNQ | – | ||
| Wakayama | Wakayama | Chōfu | Chōfu | Far East | DNQ | |||
| Chōfu | Chōfu | Wakayama | Wakayama | Far East | DNQ | |||
| Chōfu | Chōfu | Izumi Otsu | Otsu | Far East | DNQ | |||
| Chōfu | Chōfu | Sendai Minami | Sendai | Far East | DNQ | |||
| Chōfu | Chōfu | Nerima | Tokyo | Far East | DNQ | |||
| Chōfu | Chōfu | Tokyo Machida | Tokyo | Far East | Banned[2] | |||
| Chōfu[3] | Chōfu | Komae | Tokyo | Far East | Champions | 3–0 | ||
| Chōfu | Chōfu | Higashi Osaka | Osaka | Far East | DNQ | – | ||
| Amagasaki Kita | Amagasaki | Suginami | Tokyo | Far East | DNQ | |||
| Settsu | Settsu | Sendai Chuo | Sendai | Far East | DNQ | |||
| Suginami | Tokyo | Wakayama | Wakayama | Far East | DNQ | |||
| Motomaki Chuo | ? | Nakano Higashi | Tokyo | Far East | DNQ | |||
| Chōfu | Chōfu | Kohhoku | Yokohama | Far East | DNQ | |||
| Osaka Yodogawa | Osaka | Asahi | Yokohama | Far East | 3rd place | 2–1 | ||
| Taisho | Osaka | Hamamatsu | Hamamatsu | Far East | DNQ | – | ||
| Hoya | Tokyo | Adachi Kita | Tokyo | Far East | DNQ | |||
| Tokorozawa | Tokorozawa | Ehime Nishi | ? | Far East | DNQ | |||
| Chōfu | Chōfu | Aichi Iwakura | Iwakura | Far East | DNQ | |||
| Osaka Higashi | Osaka | Nagoya Higashi | Nagoya | Far East | DNQ | |||
| Settsu | Settsu | Chōfu | Chōfu | Far East | DNQ | |||
| Hadano | Hadano | Takaishi | Takaishi | Far East | DNQ | |||
| Omiya | Ōmiya | Takatsuki | Takatsuki | Far East | DNQ | |||
| Minato | Tokyo | Hasuda | Hasuda | Far East | DNQ | |||
| Sumida | Tokyo | Kumamoto Chuo | Chūō | Far East | DNQ | |||
| Edogawa Minami | Tokyo | Seya | Yokohama | Far East | DNQ | |||
| Izumisano | Izumisano | Midori Chuo | Kanagawa | Far East | DNQ | |||
| Matsusaka | Matsusaka | Hiratsuka | Hiratsuka | Far East | DNQ | |||
| Seya | Yokohama | Takarazuka | Takarazuka | Far East | 3rd place | 2–2 | ||
| Kashima | Kashima | Seya | Yokohama | Far East | Runner-up | 3–2 | ||
| Hirakata | Hyogo Harima | Harima | Far East | Champions | 4–1 | |||
| Musashi Fuchu | Tokyo | Kodaira | Kodaira | Far East | 3rd place | 3–1 | ||
| Tokyo Kitasuna | Tokyo | Nagoya Kita | Nagoya | Asia | Champions | 5–1 | ||
| Sendai Higashi | Sendai | Takarazuka | Takarazuka | Asia | Runner-up | 5–1 | ||
| Musashi Fuchu | Tokyo | Chōfu | Chōfu | Asia | Champions | 6–0 | ||
| Sendai Higashi | Sendai | Tokyo Kitasuna | Tokyo | Asia | DNQ | – | ||
| Chiba City | Chiba | Gifu Tohno | Gifu | Asia | 4th place | 4–2 | ||
| Kawaguchi | Kawaguchi | Musashi Fuchu | Tokyo | Asia | Runner-up | 5–1 | ||
| Tokyo Kitasuna | Tokyo | Hiratsuka | Hiratsuka | Japan | Runner-up | 4–1 | ||
| Edogawa Minami | Tokyo | Matsusaka | Matsusaka | Japan | 3rd place | 5–1 | ||
| Chiba City | Chiba | Izumisano | Izumisano | Japan | Quarterfinals | 2–2 | ||
| Edogawa Minami | Tokyo | Hirosaki Aomori | Hirosaki | Japan | Champions | 5–0 | ||
| Hamamatsu Minami | Hamamatsu | Seya | Yokohama | Japan | Runner-up | 5–2 | ||
| Tokyo Kitasuna | Tokyo | Matsusaka | Matsusaka | Japan | Champions | 5–0 | ||
| Musashi Fuchū | Tokyo | Sendai Aoba | Sendai | Japan | Champions | 5–0 | ||
| Tokyo Kitasuna | Tokyo | Toyonaka | Toyonaka | Japan | 3rd place | 4–2 | ||
| Tokyo Kitasuna | Tokyo | Hachioji | Tokyo | Japan | Champions | 5–0 | ||
| Chōfu | Tokyo | Sendai Higashi | Sendai | Japan | Round 1 | 1–2 | ||
| Tokyo Kitasuna | Tokyo | Chiba City | Chiba | Japan | Champions | 5–0 | ||
| Kawaguchi | Kawaguchi | Nagasaki Minami | Nagasaki | Japan | 3rd place | 4–2 | ||
| Chōfu | Tokyo | Ushiku | Ushiku | Japan | 3rd place | 4–1 | ||
| 2020 | align=center colspan=7 | Cancelled due to COVID-19 crisis [4] | ||||||
| Takarazuka | Takarazuka | Fukaya City | Fukaya | Japan | No Int'l teams [5] | – | ||
| Takarazuka | Takarazuka | Hiroshima Aki | Hiroshima | Japan | Round 2 | 0–2 | ||
| Musashi Fuchu | Tokyo | Shōnan | Shōnan | Japan | Round 4 | 3–2 | ||
As of the 2023 Little League World Series.
| Prefecture | JC | WS | Record | PCT | |
|---|---|---|---|---|---|
| Tokyo | 34 | 19 | 69–17 | ||
| Osaka | 7 | 2 | 6–2 | ||
| Saitama | 4 | 2 | 9–3 | ||
| Wakayama | 3 | 2 | 4–2 | ||
| Kanagawa | 3 | 1 | 2–2 | ||
| Hyogo | 3 | 1 | 0–2 | ||
| Chiba | 2 | 2 | 6–4 | ||
| Miyagi | 2 | 1 | 5–1 | ||
| Shizuoka | 1 | 1 | 5–2 | ||
| Ibaraki | 1 | 1 | 3–2 | ||
| Mie | 1 | 0 | – | ||
| Aomori | 1 | 0 | – |