CHIZU — the atlas of coffee research
Coffee research in China
Two limits come with this count. Only 100,474 of the 190,643 searchable papers (52.7%) carry an author affiliation country. The other 90,169 (47.3%) carry none. So these 4,887 papers are 4,887 out of the 100,474 whose affiliation is known. And a co-authored paper is counted once for every country its authors sit in. Per-country counts therefore do not add up to the whole.
China is a coffee-producing country.
Check it yourself
This is not our word for it. You can run the same query against the same index.
When they were written
1957–2026
Years before 1600 are treated as unknown. The upstream data (OpenAlex) sometimes writes 1400 when the year is missing, and that is a placeholder, not a measurement.
Where they appeared
Top 8 sources (journals and repositories)
Most cited
10 papers, most cited first
- Chlorogenic acid (CGA): A pharmacological review and call for further research2017cited 1,554
- E-Cigarettes2014cited 1,206open access
- Universal physical responses to stretch in the living cell2007cited 717open access
- The coffee genome provides insight into the convergent evolution of caffeine biosynthesis2014cited 666open access
- The Tea Tree Genome Provides Insights into Tea Flavor and Independent Evolution of Caffeine Biosynthesis2017cited 660open access
- Roles of Chlorogenic Acid on Regulating Glucose and Lipids Metabolism: A Review2013cited 584open access
- Meta-analysis of modifiable risk factors for Alzheimer's disease2015cited 582
- Serum Cholesterol in Young Men and Subsequent Cardiovascular Disease1993cited 523open access
- Environmental risk factors in inflammatory bowel disease: a population-based case-control study in Asia-Pacific2014cited 444open access
- Chlorogenic acid: A comprehensive review of the dietary sources, processing effects, bioavailability, beneficial properties, mechanisms of action, and future directions2020cited 436
Which stage of coffee
Only 30.2% of the whole index carries a stage label. Of this country's 4,887 papers, 1,763 carry one. The breakdown below is about those 1,763 papers only — the rest were never candidates for it.
One paper can carry several labels, so the breakdown adds up to more than that number.
Which field
Only 75.9% of the whole index carries a field label. Of this country's 4,887 papers, 3,667 carry one. The breakdown below is about those 3,667 papers only — the rest were never candidates for it.
One paper can carry several labels, so the breakdown adds up to more than that number.
What language
"undetermined" means the upstream record carried no language. We did not guess one.
Knowledge is not evenly spread
Counting only papers whose author affiliation is known, the largest is Indonesia with 22,248. China has 4,887 — a factor of 5.
That gap does not follow where coffee is grown. Research gathers where the means to do research are, not where the coffee is. Making that visible is why CHIZU exists.
Other countries
Indonesia 22,248United States 17,988Brazil 10,857United Kingdom 5,569India 3,542Germany 3,185Italy 3,111France 3,072Japan 2,822Colombia 2,489Spain 2,363Canada 2,352