Number of clinical trials in Japan
Japan: Number of clinical trials was 138 trials in 2024. ◆ Volatile
Number of clinical trials in Japan, 2000–2024
Source: ClinicalTrials.gov (2025) – with major processing by Our World in Data. Measured in trials.
Analysis
The most recent figure for number of clinical trials in Japan is 138 trials, measured in 2024.
Compared with earlier readings it is down 15.3% on the previous year and down 44.6% over ten years.
Over the whole period, number of clinical trials in Japan peaked at 249 trials in 2014 and was at its lowest, 1 trials, in 2000.
Japan ranks 21st of 153 countries on this measure, in the top quarter.
The series is highly variable year to year, so single readings are best treated with caution.
Number of clinical trials in Japan, year by year
| Year | trials | Change |
|---|---|---|
| 2000 | 1 trials | — |
| 2001 | 2 trials | +100.0% |
| 2003 | 8 trials | +300.0% |
| 2004 | 24 trials | +200.0% |
| 2005 | 42 trials | +75.0% |
| 2006 | 62 trials | +47.6% |
| 2007 | 95 trials | +53.2% |
| 2008 | 163 trials | +71.6% |
| 2009 | 166 trials | +1.8% |
| 2010 | 237 trials | +42.8% |
| 2011 | 194 trials | -18.1% |
| 2012 | 234 trials | +20.6% |
| 2013 | 230 trials | -1.7% |
| 2014 | 249 trials | +8.3% |
| 2015 | 230 trials | -7.6% |
| 2016 | 237 trials | +3.0% |
| 2017 | 244 trials | +3.0% |
| 2018 | 241 trials | -1.2% |
| 2019 | 198 trials | -17.8% |
| 2020 | 171 trials | -13.6% |
| 2021 | 178 trials | +4.1% |
| 2022 | 172 trials | -3.4% |
| 2023 | 163 trials | -5.2% |
| 2024 | 138 trials | -15.3% |
Japan compared with similar countries
- Japan's 138 trials is above the median for high income countries, which is 46.5 trials, 3.0× the median. (54 countries reporting)
- Japan's 138 trials is above the median for East Asia & Pacific, which is 50.5 trials, 2.7× the median. (18 countries reporting)
Biggest year-on-year movements
Years where Number of clinical trials in Japan changed far more than this series normally does. A large move can be a real event or a change in how the figure was measured — the source note below says who published it.
| Year | Change | From | To |
|---|---|---|---|
| 2003 | +300.0% | 2 trials | 8 trials |
| 2004 | +200.0% | 8 trials | 24 trials |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 2000s | 62.56 trials | 1 trials | 166 trials | 9 |
| 2010s | 229.4 trials | 194 trials | 249 trials | 10 |
| 2020s | 164.4 trials | 138 trials | 178 trials | 5 |
Countries ranked near Japan
More reference data data for Japan
- Emission Totals - Indirect emissions (N2O) - Manure applied to Soils 1.19 (2050)
- Emission Totals - Indirect emissions (N2O) - Manure left on Pasture 0.981 (2050)
- Emission Totals - Indirect emissions (N2O) - IPCC Agriculture 4.49 (2050)
- Emission Totals - Indirect emissions (N2O) - Crop Residues 0.3629 (2050)
- Emission Totals - Indirect emissions (N2O) - Agricultural Soils 4.49 (2050)
- Emission Totals - Emissions (N2O) - Manure applied to Soils 3.98 (2050)
- Emission Totals - Emissions (N2O) - Manure Management 4.16 (2050)
- Emission Totals - Emissions (N2O) - Manure left on Pasture 5.57 (2050)
- Emission Totals - Emissions (N2O) - IPCC Agriculture 23.74 (2050)
- Emission Totals - Emissions (N2O) - Crop Residues 1.98 (2050)
Frequently asked questions
- What is number of clinical trials in Japan?
- Number of clinical trials in Japan was 138 trials in 2024, according to ClinicalTrials.gov (2025) – with major processing by Our World in Data.
- What is the highest number of clinical trials recorded in Japan?
- The highest recorded value was 249 trials in 2014.
- What is the lowest number of clinical trials recorded in Japan?
- The lowest recorded value was 1 trials in 2000.
- How does Japan rank for number of clinical trials?
- Japan ranks 21st out of 153 countries with data for 2024.
- Is number of clinical trials rising or falling in Japan?
- Over the last ten years it is down 44.6%. The long-run trend across the full record is volatile.
- Where does this Japan data come from?
- The figures come from ClinicalTrials.gov (2025) – with major processing by Our World in Data, published as part of Number of clinical trials. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 24 observations, free to reuse under CC BY 4.0 (Our World in Data).
About this data
Annual number of completed clinical trials registered in the ClinicalTrials.gov database for each country. Registration in the ClinicalTrials database is mandatory for trials in the United States, but voluntary for other countries.