<p>Despite its advanced level of scientific research, Japan suffers from a low level of adult scientific literacy compared to many other developed countries. The current situation certainly necessitates a nationwide, robust solution. However, to implement any countermeasures, it is essential to first answer one of the fundamental questions: Does current school education guarantee the acquisition and maintenance of scientific literacy? To provide an answer, the present study examined high school textbooks from both Japan and Canada. Canada was chosen as a counterpart, since Canadian adults reportedly possess outstanding levels of scientific literacy. In this comparative analysis, questions from all of the biology textbooks were examined to reveal the directed level of cognitive processes, key factors considered to play essential roles for becoming scientifically literate. Categorization based on Bloom's Taxonomy clearly demonstrated that Japanese high school textbooks were not equipped with questions that foster higher cognitive processes, contrary to the Canadian textbooks. Overall, the government-approved textbooks currently used throughout Japan appear to be insufficient for guaranteeing the acquisition and maintenance of scientific literacy.</p>