Abstract
Introduction of fracture mechanics to Japan at the end of 1960s stimulated the subsequent research on material testing. Especially the golden time of fatigue research in 1970s and 1980s was highlighted. The author considers that several research topics driven by several active professors steered the fatigue researches during the golden time. However, after collapse of bubble economy at the beginning of 1990s, research themes in fatigue were widely diverged. Current research in fatigue seems rather practice-oriented and degrading of fundamental research concerned.
