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
|
13.11
|
+1
|
|
Materials Science
|
12.83
|
-3
|
|
Pharmacology
|
11.67
|
-23
|
|
Chemistry
|
10.29
|
Even
|
|
Biology & Biochemistry
|
10.15
|
-17
|
|
Molec. Biol. & Genetics
|
9.57
|
-12
|
|
Microbiology
|
9.19
|
-25
|
|
Agricultural Sciences
|
8.77
|
-15
|
|
Japan's overall percent share, all fields:
8.49
|
|
Engineering
|
8.47
|
-6
|
|
Neurosciences & Behavior
|
8.15
|
-25
|
|
Immunology
|
7.78
|
+15
|
|
Clinical Medicine
|
7.58
|
-16
|
|
Plant & Animal Sciences
|
7.41
|
+1
|
|
Computer Science
|
7.38
|
-47
|
|
Geosciences
|
6.83
|
Even
|
|
Space Science
|
6.69
|
+17
|
|
Mathematics
|
5.29
|
-16
|
|
Ecology/ Environmental
|
3.94
|
-13
|
|
Economics & Business
|
2.19
|
-56
|
|
Psychology/ Psychiatry
|
1.91
|
-41
|
|
Social Sciences
|
1.06
|
-28
|
Between 2003 and 2007, Thomson Reuters indexed 361,575 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 physics research was 1% above the world average
(3.98 citations per paper for Japan, versus 3.96 cites for the world).
Papers from Japan-based researchers also scored well in immunology (15%
above the world mark) and space science (+17%). In two fields, the impact
of Japanese research happened to match the world average precisely:
chemistry (4.81 cites per paper) and geosciences (3.79 cites).
SOURCE:
National
Science Indicators, 1981-2007 (containing listings of output and
citation statistics for more than 170 countries; available in standard and
deluxe versions from the
Research Services Group).
