Naoya Kusakawa (born April 6, 1998) is a Japanese singer and actor. Born in Tokyo and affiliated with Stardust Promotion's Section 3, he is active as a rapper and dancer for the five-member dance and vocal group ONE N' ONLY. He was previously a member of the unit EBiSSH within EBiDAN, and after a period of concurrent activities, he is now focused solely on ONE N' ONLY. His older brother is Takuya (Takuya Kusakawa) of Chotokkyu (Bullet Train). While possessing a calm personality, he has a strong sense of responsibility and is referred to as the "mother figure" within the group due to his caring nature. In his private life, he is the younger of two brothers, but his members describe him as reliable and "not very little brother-like," and he is the self-acknowledged mediator of the group. On the other hand, he analyzes himself as someone who doesn't take the lead in making a scene, but rather enjoys watching those around him get excited. His hobbies are diverse, including shopping, fashion coordination, and watching movies and dramas, showing a high interest in style. In fact, he is known as the group's "fashion leader" for his ability to pull off any style of clothing. His favorite food is yakiniku, specifically salted beef tongue, and he also has sophisticated hobbies such as collecting vintage clothes and taking photos with film cameras. His special skill is soccer, which he played for 11 years since childhood; he possesses high physical ability and is skilled at vaulting boxes and doing push-ups using only his fingertips. The endurance and core strength cultivated through sports are utilized in his dance performances and action acting. Regarding his appearance, he is often teased for having a "baby face" that makes him look younger than his actual age, but he uses this to his advantage to play a wide range of roles, from refreshing high school students to more mature characters. He is also dedicated to beauty and skincare, calling his days off "maintenance days" and never failing to visit the dermatologist for skin treatments. His family consists of four members: his parents and his older brother. His brother, Takuya Kusakawa, is an artist active as a member of Bullet Train and was the one who inspired him to enter the entertainment industry. The brothers are very close; in 2022, they collaborated for the first time in the fashion magazine "NYLON JAPAN," where Naoya appeared as a "double" for Takuya's solo cover issue. The magazine also featured a dialogue between the brothers, discussing their private lives and childhood episodes. Naoya himself admires standing on the same stage as his brother but holds the conviction that he wants to be evaluated for his own abilities rather than just being "the brother," and he is steadily carving his own path through lead roles won in auditions and his track record in various fields. He often spends time with the members of ONE N' ONLY both professionally and privately, and their outings for shopping or hanging out on days off are frequently shared on social media and blogs. When asked about people he respects, he often mentions his brother, Takuya. Naoya has stated, "I wouldn't be who I am today without my brother," and says that his brother's professional consciousness as a performer and his fashion sense are reflected in him. As an actor, he has mentioned in interviews that he has much to learn from director Rikiya Imaizumi, with whom he worked on the drama "His: I Didn't Intend to Fall in Love," as well as talented senior actors like Tomoya Nakamura and Masaki Suda. He has expressed his ambition to "gain more experience as an actor and become a first-class expressive artist," aiming to be a unique presence as an actor in addition to his roles as a singer, rapper, and dancer. Fans and the media praise his versatility, calling him "the group's best all-around entertainer" and a "talented performer of the next generation."