What's New in Research: June 11, 2007
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Science in Japan, 2002-06

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 Scientific database. Also, Japan's relative citation impact compared to the world average in each field, in percentage terms.

Between 2002 and 2006, Thomson Scientific indexed 360,393 papers that listed at least one author address in Japan. Of those papers, the highest percentage appeared in journals classified under the heading of materials science, followed closely by physics. As the right-hand column indicates, the impact of Japanese materials-science research happened to match the world average precisely, at 2.65 cites per paper. In physics, meanwhile, Japan scored at just 1% below the world mark (3.74 cites per paper for Japan versus 3.77 for the world). Japan's scores were notably strong in space science (16% above the world mark) and immunology (+10%). And in two fields in addition to physics, Japan's impact was an even match with the world score: chemistry (4.53 cites per paper) and plant & animal sciences (3.07 cites).

SOURCE: National Science Indicators, 1981-2006 (containing listings of output and citation statistics for more than 170 countries; available in standard and deluxe versions from the Research Services Group.

10-year country rankings for Japan, 1997-February 28, 2007. From SCI-BYTES features, archived years of Science in Japan 2001-2005 2000-2004 1999-2003 1998-2002 1997-2001 1996-2000  Country profile of Japan profile 1996-October 31, 2006 Country profile of Japan profile 1992 - June 30, 2002

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