Science in Japan, 2006-10

October 2011

Japan’s world share of science and social-science papers over a recent five-year period, expressed as a percentage of papers in each of 21 fields in the Thomson Reuters database. Also, Japan’s relative citation impact compared to the world average in each field, in percentage terms.

Field % papers fr. Japan Impact vs. world
Physics  10.57 +5
Pharmacology & Toxicology 10.05 -16
Materials Science 9.46 -2
Biology & Biochemistry 9.39 -11
Chemistry 8.39 +4
Molecular Biology & Genetics 8.26 -4
Microbiology 7.64 -12
Space Science 7.45 +17
Neuroscience & Behavior 7.21 -17
Japan's overall percent share, all fields: 7.05
Clinical Medicine 7.02 -16
Immunology 6.99 +13
Engineering 6.67 -17
Plant & Animal Science 6.63 +9
Geosciences 6.27 +11
Agricultural Science 5.33 -18
Computer Science 5.22 -32
Mathematics 4.80 -18
Environment/Ecology 3.86 -15
Economics & Business 2.24 -47
Psychiatry/Psychology 1.78 -38
Social Sciences 1.02 -25

Between 2006 and 2010, Thomson Reuters indexed 381,181 papers that listed at least one author address in Japan. Of those papers, the highest percentage appeared in journals indexed under the main heading of physics, followed by pharmacology & toxicology. As the right-hand column shows, the impact (or, citations per paper) mark for papers featuring Japan-based authors was 5% above the world figure for the five-year period (4.69 citations per paper for Japan versus the world average of 4.46). Although Japan currently lags the world average in many of the fields shown, the nation’s performance in relative impact was strong in space science (17% above the world mark), immunology (+13%), and geosciences (+11%).

SOURCE: InCitesTM Global Comparisons, Thomson Reuters.

The data and citation records included in this report are from Thomson Reuters Web of ScienceTM. Web of ScienceTM is a registered trademark of Thomson Reuters. All rights reserved.