Rating history over the past 20 seasons (2006-2025)
Values are as of each month's end. The bold dashed line is the average of 1500, and both panels share the vertical scale.
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Scroll right to see the full chart
Strongest teams, 2006-2025 - top 10 by in-season peak Elo
Ranked by the highest value reached during each season (measured after games). Only completed seasons in the covered window are eligible; the season in progress is not included. Team names are shown as they were at the time.
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| Rank | Year | Team | Peak Elo | Reached on |
|---|---|---|---|---|
| 1 | 2017 | Fukuoka SoftBank Hawks | 1578.1 | Sep 16 |
| 2 | 2015 | Fukuoka SoftBank Hawks | 1569.2 | Sep 21 |
| 3 | 2016 | Fukuoka SoftBank Hawks | 1567.3 | Jun 30 |
| 4 | 2009 | Yomiuri Giants | 1565.5 | Sep 27 |
| 5 | 2025 | Fukuoka SoftBank Hawks | 1560.8 | Sep 18 |
| 6 | 2012 | Yomiuri Giants | 1560.4 | Sep 25 |
| 7 | 2013 | Yomiuri Giants | 1558.8 | Sep 12 |
| 8 | 2010 | Yomiuri Giants | 1556.6 | May 16 |
| 9 | 2020 | Fukuoka SoftBank Hawks | 1556.1 | Nov 4 |
| 10 | 2018 | Fukuoka SoftBank Hawks | 1556.1 | Oct 8 |
Highest so far this season: SoftBank at 1577.7 (reached Fri, Oct 2)
Weakest teams, 2006-2025 - bottom 10 by in-season lowest Elo
Ranked by the lowest value reached during each season (measured after games), lowest first. Only completed seasons in the covered window are eligible; the season in progress is not included. Team names are shown as they were at the time.
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| Rank | Year | Team | Lowest Elo | Reached on |
|---|---|---|---|---|
| 1 | 2010 | Yokohama BayStars | 1420.3 | Oct 6 |
| 2 | 2011 | Yokohama BayStars | 1420.4 | Sep 11 |
| 3 | 2006 | Tohoku Rakuten Golden Eagles | 1426.0 | Aug 15 |
| 4 | 2012 | Yokohama DeNA BayStars | 1427.0 | Sep 19 |
| 5 | 2017 | Tokyo Yakult Swallows | 1432.2 | Oct 3 |
| 6 | 2009 | Yokohama BayStars | 1434.5 | Oct 7 |
| 7 | 2008 | Yokohama BayStars | 1441.9 | Oct 3 |
| 8 | 2013 | Yokohama DeNA BayStars | 1443.1 | Jun 9 |
| 9 | 2024 | Saitama Seibu Lions | 1443.2 | Aug 13 |
| 10 | 2018 | Tokyo Yakult Swallows | 1443.5 | May 25 |
Lowest so far this season: Yakult at 1457.3 (recorded Sun, Oct 4)
Best and worst years by club (2006-2025)
For each club, the year of its highest in-season value (best year) and of its lowest (worst year). Ties go to the more recent year. Clubs appear under their current names (earlier years may have used a different name).
Each panel shows one club: the shaded band spans the season's highest to lowest value, and the thick line is the value at the end of each season. ▲ marks the best year (highest in-season value) and ▼ the worst year, each labeled in the form value (year). All panels share the same vertical scale; the bold dashed line is the anchor value 1500, with faint guide lines at 1450 and 1550.
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Data table
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| Team | League | Peak Elo (year) | Lowest Elo (year) |
|---|---|---|---|
| Central League | 1549.8 (2008) | 1471.4 (2016) | |
| Central League | 1565.5 (2009) | 1469.6 (2006) | |
| Central League | 1514.9 (2023) | 1420.3 (2010) | |
| Central League | 1554.3 (2018) | 1457.1 (2007) | |
| Central League | 1539.1 (2022) | 1432.2 (2017) | |
| Central League | 1542.2 (2006) | 1457.4 (2017) | |
| Pacific League | 1578.1 (2017) | 1485.4 (2009) | |
| Pacific League | 1549.7 (2018) | 1443.2 (2024) | |
| Pacific League | 1550.4 (2016) | 1465.0 (2023) | |
| Pacific League | 1550.0 (2023) | 1453.2 (2007) | |
| Pacific League | 1536.9 (2006) | 1458.4 (2017) | |
| Pacific League | 1535.3 (2013) | 1426.0 (2006) |
The estimated figures are worked out by this site and are not official announcements.
Reading the 'strongest and weakest teams' tables (last 20 seasons)
The strongest-teams table ranks the highest value each club reached during a season within the covered period (measured after games). Even a champion can log its peak early if it fades late. Read it as a gauge of how dominant a given year's team was.
The weakest-teams table is its mirror image: the lowest value reached during each season, lowest first. The best-and-worst-years table then shows, for each club, the years it recorded its highest and lowest in-season values.
Playing conditions differ across eras, so comparisons across years are not exact. Team names are shown as they were at the time.