Introduction of family-based treatment to Japan with adaptations to optimize the cultural acceptability and advance current traditional treatments of adolescent anorexia nervosa.

Given the lack of clear consensus on effective treatment models for adolescent anorexia nervosa in Japan, treatment programs offered to this population vary widely between treatment facilities with limited testing of outcomes. Importantly, families have traditionally been left out of the core treatment process, as they are commonly viewed as being powerless in renourishing their child. The purpose of this commentary was to report the authors' preliminary efforts to introduce and implement family-based treatment (FBT) in Japan so that, on par with international standards of practice, FBT may become the first-line treatment option for Japanese families. This commentary will describe the systemic and cultural barriers which posed as challenges in introducing FBT to Japan in its manualized standard format and how these were addressed by introducing FBT during the patient's hospital admission and by assigning the father with a role which resembles the traditional gender role within the Japanese family culture. Authors have thus far observed that these adaptations led to increased accessibility of FBT and improved outcomes such as reduced number of hospitalizations and shorter time taken to reach 85-90% EBW. Further considerations for the broad dissemination and implementation of FBT in Japan are also presented.