[Digital CBT for Depression].

Cognitive behavioral therapy (CBT) is an effective treatment for depression; however, challenges remain, including a shortage of trained therapists and difficulties in treatment adherence. In recent years, digital CBT (iCBT) using smartphone applications has gained attention because of its potential to reduce disparities in treatment access and improve adherence. While the research and development of iCBT is progressing in Japan, further dissemination will require institutional support and attention to ethical issues. This article reviews the status and challenges of iCBT in the treatment of depression.