In a recent interview, Japanese footballer Yuto Nagatomo humorously referred to his wife, actress Airi Taira, as a "mental monster." The comment was seemingly in a positive sense, referring to her resilience, strength, and firmness. The phrase has gained attention due to the society's continuous advocacy for mental health awareness. This comes as part of Nagamoto's series of interview where he opens up about his family life, in addition to his sports career.

In Japan, mental health is an increasingly prominent topic, making Nagatomo's comments especially noteworthy. The term "mental monster" isn't seen as derogatory but instead portrays a person of incredible inner strength. In addition, celebrities' off-field life, especially their relationship ups and downs are commonly featured in tabloids. Nagatomo and Taira are a popular celebrity couple, and their relationship is often under the spotlight.

In Western countries, discussions around mental health are also highly important. If translated literally, the term 'Mental Monster' might have a negative connotation in the U.S. or Europe. However, within the relevant cultural context, it can be seen similarly to a term of endearment or respect for strength. Celebrities sharing personal life stories are common worldwide.