Japan vs Tonga: Red List Index
Japan
0.7393 index
in 2025
Tonga
0.7501 index
in 2025
Japan rank
199th
Tonga rank
197th
Red List Index over time
- Japan
- Tonga
How they compare
Tonga currently reports 0.7501 index against 0.7393 index in Japan, a difference of 0.0108 index.
Across all 46 years both countries report, Tonga has been ahead every year.
Japan ranks 199th and Tonga ranks 197th of 243 countries.
Tonga has averaged higher in every one of the 5 decades both report.
Head to head by decade
| Decade | Japan | Tonga | Difference | Ahead |
|---|---|---|---|---|
| 1980s | 0.7827 index | 0.8154 index | 0.0328 index | Tonga |
| 1990s | 0.7789 index | 0.8171 index | 0.0381 index | Tonga |
| 2000s | 0.7741 index | 0.8129 index | 0.0388 index | Tonga |
| 2010s | 0.7615 index | 0.7873 index | 0.0258 index | Tonga |
| 2020s | 0.745 index | 0.7586 index | 0.0136 index | Tonga |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher red list index, Japan or Tonga?
- Tonga, at 0.7501 index against 0.7393 index in Japan as of 2025.
- What is the difference in red list index between Japan and Tonga?
- 0.0108 index, with Tonga ahead.
- How many years of comparable data are there for Japan and Tonga?
- 46 years are reported by both, from 1980 to 2025.
- How do Japan and Tonga rank globally for red list index?
- Japan ranks 199th and Tonga ranks 197th of 243 countries.
- Where does this data come from?
- United Nations Statistics Division, SDG Global Database, published as Red List Index. Statizoid refreshes it automatically from the source and publishes the full history for both places.