For the last several years, predatory journals have been a topic of discussion in top scientific journals, such as . Predatory journals are problematic because they create public mistrust of scientific publication as a whole by the mass production of non-credible publications with the sole aim of profit. Recently, articles in a Japanese newspaper and online articles exposed domestic institutions for the number of publications in predatory journals, saying that they "abused predatory journals to increase the number of their publications and falsely inflate their academic achievements." We do not subscribe to this point of view because publications in predatory journals do not count as scholarly achievements, and we believe it is an information literacy problem. We feel strongly that it is both important and beneficial for the readers of to be aware of and understand this issue.