Eiku Yamashita

Eiku Yamashita is a Japanese singer and actor, best known as a vocalist and the youngest member of the five-member dance and vocal group ONE N' ONLY. Born on December 19, 1999, in Kofu, Yamanashi Prefecture, he has built a reputation for his powerful vocals and energetic stage presence, which have made him a standout in the J-pop scene. As of 2026, Yamashita continues to perform with ONE N' ONLY while also expanding his acting career with roles in television dramas and films.

His journey in entertainment began with the EBiDAN unit Satori Boys Club, and he later joined ONE N' ONLY at its formation in 2018. Beyond music, he has taken on supporting roles in dramas such as "Ayaka Is in Love with Hiroko!" and "Red Blue," showing his range as a performer. Fans appreciate his youthful charm and genuine personality, which shine through in both his performances and his interactions on social media. [编辑]

Eiku Yamashita was born on December 19, 1999, in Kofu, Yamanashi Prefecture, Japan. Growing up in Yamanashi, he developed an early interest in music, starting to play the drums at age six and later picking up guitar and bass at age ten. His hobbies included playing musical instruments, basketball, soccer, gymnastics, and gaming, and he showed a natural talent for dancing as well.

His path to stardom began when he joined the EBiDAN unit Satori Boys Club (SBC) in 2015. During his time with SBC, he honed his performance skills and gained valuable stage experience. In 2017, he made his acting debut in the film "The Badly-Bruised Devil," which opened the door to more opportunities. His naivete and tendency to misread kanji characters endeared him to fans, and his youthful appearance often made him seem younger than his age, a trait that became part of his charm.

In 2018, after a joint tour between EBiSSH and SBC, Yamashita became part of the newly formed group ONE N' ONLY, which officially debuted on May 7, 2018, with the single "I'M SWAG." This marked the beginning of his professional career as a member of a mainstream idol group. [编辑]

Since joining ONE N' ONLY in 2018, Eiku Yamashita has been a key vocalist, contributing his strong voice to the group's releases and live performances. The group gained a following with their energetic dance tracks and polished choreography, and Yamashita's stage presence became a highlight of their shows. He also participated in the group's joint activities, including tours and variety appearances.

Alongside his music career, Yamashita has steadily built an acting resume. After his debut in "The Badly-Bruised Devil" (2017), he appeared in the drama "FAKE MOTION: Tatta Hitotsu no Negai" in 2021 and "Blue Box Briefing" in 2022. In 2024, he took on supporting roles in "Ayaka Is in Love with Hiroko!" and "Red Blue," as well as the film "Ayaka-chan wa Hiroko-senpai ni Koishiteru." His upcoming projects include "MADDER: I am the Culprit in That Case" and "Takumi-kun Series: Drama," both slated for 2025, showing his growing presence in the acting world.

In March 2025, ONE N' ONLY underwent a lineup change when member Kenshin departed, leaving the group as a five-member unit. Yamashita has continued to focus on his work with the group and his solo endeavors, demonstrating his commitment to his craft. [编辑]

Eiku Yamashita is perceived as a charismatic and talented performer, known for his strong vocals and dynamic stage presence. He has a youthful and approachable image, which resonates with fans. His naivete and occasional mispronunciations add to his charm, making him appear genuine and relatable. On social media, he engages with fans warmly, sharing updates and personal moments. He is also recognized for his versatility, balancing music and acting, which broadens his appeal beyond just the idol community. [编辑]

The audience surrounding Eiku Yamashita operates without a formal collective designation, distinguishing his fanbase from groups with established titles or branded identities. While he maintains a warm and active connection with supporters through social media platforms, no specific terminology exists to label the community as a whole, nor are there documented records of organized campaigns, charity drives, or fan-funded projects dedicated solely to his individual career milestones. His appeal remains rooted in the broader reception of his work with ONE N' ONLY rather than isolated phenomena unique to his solo persona. In the realm of public legend, no viral incidents, extraordinary crowd reactions, or folklore have emerged to define his narrative; his public history consists strictly of verifiable professional achievements and personal habits. Regarding global standing, iFANN has evaluated this profile but determined that he does not currently hold a placement within the published Global Top 1,000 rankings or any Top-100 scope list. Consequently, no specific ordinal position can be assigned to his current fame metrics. The absence of a ranking reflects a status where the subject is recognized within their industry but has not yet crossed the threshold required for inclusion in the highest tier of global celebrity indices.[编辑]

Eiku Yamashita possesses several distinctive traits that have endeared him to observers over the years. He is frequently noted for his naivete, particularly his tendency to misread or mispronounce kanji characters, a quirk that has evolved into a running joke among his followers. Contrary to his youthful appearance, he holds the distinction of being the oldest member of the five-member group ONE N' ONLY, a fact that often surprises those who encounter him. His musical foundation was laid early; he began playing the drums at age six and expanded to guitar and bass by age ten. Beyond performance, he contributes creatively to the group by writing his own lyrics and music. In his leisure time, he enjoys competitive sports such as basketball and soccer, alongside gaming sessions. He maintains an official Instagram account where he offers fans glimpses into his daily life and behind-the-scenes moments. There are no verified legends or viral folklore associated with him in current records, so his public narrative remains grounded in these personal habits and professional milestones.[编辑]

Details about Eiku Yamashita's family are not widely publicized, as he tends to keep his personal life private. He was born in Kofu, Yamanashi Prefecture, and grew up there, but information about his parents or siblings has not been shared in the media. He has not mentioned any pets or provided details about his current household. As of 2026, he is not known to be married or have children, and he focuses on his career with ONE N' ONLY. [编辑]

Eiku Yamashita is associated with his fellow ONE N' ONLY members: Hayato, Rei, Tetta, and Naoya. He is also linked to the EBiDAN network and has worked with various actors and directors in his acting projects, such as the cast and crew of "Ayaka Is in Love with Hiroko!" and "Red Blue." [编辑]

山下永玖尚未公开分享过他的恋情细节。作为一名J-pop偶像，他维持的公众形象通常避免谈论约会，媒体也没有报道过任何确定的恋情。截至2026年，他被认为仍是单身，专注于ONE N' ONLY的演艺事业和他的表演项目。[编辑]

As of 2026, iFANN estimates Eiku Yamashita's net worth to be $2 Million. His primary income comes from his work with ONE N' ONLY, including album sales, concert tours, and merchandise. As a member of the group under Stardust Promotion, he likely receives a share of the group's earnings, which have grown since their debut in 2018. Additionally, his acting roles in dramas and films contribute to his income, as do any solo activities such as endorsements or appearances. While specific figures are not publicly disclosed, his career trajectory suggests steady financial growth.[编辑]