"This study was undertaken to explore a bibliometric approach to quantitatively assess current research trends in lung cancer in Japan, using the related literature in the Science Citation Index (SCI) database
from 1991 to 2008.
Materials and Methods Articles were analyzed by the scientific output and research performances of individuals, institutes, and collaborative countries with Japan. Distribution of words in the article title, author
keywords, and KeyWords Plus in different periods was applied to evaluate research trends by the frequency
of keywords used.
Results Keyword analysis indicated that there has been a strategy to connect molecular biology with clinical practice. Researchers in Japan have published high impact articles related to non-small cell and small cell
Conclusion Finally, this study highlights the topics in lung cancer research that are becoming popular in