Japan's world share of science and social-science papers over the last five
years, 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
|
Percentage of papers
from Japan
|
Relative impact
compared to world
|
|
Physics
|
11.80
|
+4
|
|
Materials Science
|
11.26
|
+1
|
|
Pharmacology & Toxicology
|
11.24
|
-21
|
|
Biology & Biochemistry
|
10.36
|
-15
|
|
Chemistry
|
9.28
|
+6
|
|
Molecular Biology & Genetics
|
9.09
|
-9
|
|
Microbiology
|
8.37
|
-18
|
|
Neurosciences & Behavior
|
7.96
|
-20
|
|
Japan's overall percent share, all fields:
7.88
|
|
Engineering
|
7.86
|
-13
|
|
Clinical Medicine
|
7.68
|
-16
|
|
Immunology
|
7.54
|
+15
|
|
Plant & Animal Sciences
|
7.12
|
+7
|
|
Space Science
|
7.05
|
+14
|
|
Geosciences
|
6.72
|
+2
|
|
Agricultural Sciences
|
6.18
|
-21
|
|
Computer Science
|
5.53
|
+1
|
|
Mathematics
|
5.16
|
-15
|
|
Environment/Ecology
|
3.98
|
-12
|
|
Economics & Business
|
2.12
|
-54
|
|
Psychiatry/Psychology
|
1.93
|
-43
|
|
Social Sciences
|
0.97
|
-25
|
Between 2004 and 2008, Thomson Reuters indexed 383,345 papers that listed
at least one author address in Japan. Of those papers, the highest
percentage appeared in journals classified under the heading of physics,
followed by materials science. As the right-hand column indicates, the
relative citation impact of the nation’s physics research was 4%
above the world average (4.33 citations per paper for Japan, versus 4.16
cites for the world). Papers from Japan-based Researchers also scored well
in immunology (15% above the world mark) and space science (14% above).
SOURCE:
National Science Indicators, 1981-2008 (containing listings of
output and citation statistics for more than 170 countries; available in
standard and deluxe versions from the
Research Services Group).
