In January 2017, Naoki appeared at Yohji Yamamoto HOMME 2017–2018 AW Paris Collection as a show model for a second time. Naoki has also served as a show model for Y-3 2017–2018 AW Paris Collection in the same year. As LDH announced its ambition of evolving into a Global Entertainment and Creative Production Team, LDH WORLD in this year,LDH set up its branch in America, LDH USA. Naoki joined LDH USA's management team as creative career advisor, aiming to bring Japanese Culture to Hollywood. From September, he took part in Sandaime J Soul Brothers' third dome tour Sandaime J Soul Brothers Live Tour 2017 'Unknown Metropoliz', and performed in 10 continual days in Tokyo Dome.
In 2017, Naoki also began to focus more on his acting career. As early as 2015, with his vision to bring Japanese culture to the world, and his wish to become the member that focus more on oversea of his groups, Naoki decided that films would be his next move, and set up his goal of building an international base acting career. Therefore, Naoki started to take acting lessons and English courses in the same year. But it was in 2017 that he finally debut on the big screen in the film Tatara Samurai, a film that competed in the World Competition Section of the 40th Montreal World Film Festival and won the award for the Best Artistic Contribution. Naoki played Shinpei, a friend from childhood to Gosuke, the main character, and he stated that his experience in dancing has helped him to perform Japanese sword fighting scene since this two are not so far away. He won the Best Supporting Actor Award at the Auckland International Film Festival (New Zealand). On 19 August, the third film of the High&Low franchise, High&Low The Movie 2 / End of Sky, was released, and Naoki played Genji Kuki, a samurai-like killer, and leader of Kuki gang of Kuryu Group. He revived his role in High&Low The Movie 3 / Final Mission, which was released on 11 November.
With pure love for entertainment and having seen its possibility as Exile's and Sandaime J Soul Brothers' member, Naoki continues to broaden his horizon and involves himself in the planning and production of projects that expand the possibilities of dance performances. In 2017, Naoki produced a music video, "Here I Stand -Dance Ver."- by R&B singer Jay'ed, as director for the first time. He choreographed the dance move for the song, and dance alongside Harumi Sato in the music video. The music video was released on YouTube on 11 August. He also produced and performed in the Sword Cutting(辻斬り) musical for the drama × entertainment show "Uzumasa Edo Sakaba" in the same year, which was shown at Kyoto Studio Park and contained scenes of the Samurai Sword Dance Performance, which is a collaboration of sword performance and dance performance.
Naoki has a strong interest in traditional Japanese culture, especially the culture of the Japanese sword. He learned sword fighting from Ryōtarō Sugi in Ryōtarō Sugi's school for Acting before he joined his teacher in the TV drama Ishi Mondai Nashinosuke. He has been practicing sword fighting since then, and he took part in a few projects focusing on promoting the culture of Japanese Samurai and Japanese sword, including the Sword Cutting(辻斬り) musical he produced for drama × entertainment show Uzumasa Edo Sakaba in the same year in 2017, and his collaboration with EXPG Kyoto, The Samurai Sword Dance Performance.