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The correlation between the frequencies of use of Japanese medical journals and their inclusion in major worldwide secondary materials such as IM, EM, BA and CC is described in this paper. One hundred twenty-two journals that seemed to be frequently used, judging from the state of acquisition of Japanese medical journals, a survey of journals used at the libraries of medical colleges and universities in Japan, and a survey of frequently cited journals, were selected. Among the 122 journals, 52 (42.6%) were not covered in major international secondary materials. It was found that 41 (74.5%) of 55 journals, 48 selected from the above mentioned 52 (excluding 4) and 7 other frequently cited journals, were published by commerical companies. It was also found that almost none of the articles in these journals had English abstracts. Further, from a survey of the inclusion of Japanese medical journals in IM during the period from 1960 to 1984, it was found that the same journals were not always included in IM.Many Japanese medical journals which seem to be used frequently are not covered in secondary materials. This paper discusses some issues involved in the selection criteria for journals that editors of secondary materials find difficult to understand owing to the language barrier.To enhance evaluation of Japanese journals internationally, the authors suggest that it be made a rule that authors prepare an English title and English abstract for each article and that these be sent to editors of secondary materials.

Survey of the coverage of Japanese medical journals in major secondary materials, especially in index medicus.