Naozumi Takahashi is a Japanese singer and voice actor born on December 6, 1971, in Iwate Prefecture, Japan. He is affiliated with the talent agency T-Promotion. His career is marked by a dual focus on voice acting and a prolific career as a singer-songwriter, often contributing to the creative process of his music.

Takahashi's journey into the entertainment industry began with a strong foundation in music. Growing up in a musical family, he started singing at the age of three. After moving to Tokyo with aspirations of becoming a singer, he supported himself with various jobs before being discovered through a local radio show. This led to work with radio personality Manami Komori, which is considered his stepping stone into the voice acting industry. He made his debut in the music business in 1996 as part of the unit AsR with Komori, before launching a successful solo career in 2002.

As a voice actor, Takahashi is known for his versatility and ability to portray a wide range of characters, from young and energetic boys to more seductive and complex roles. One of his most iconic and enduring roles is Bunta Marui in The Prince of Tennis series. His portrayal of the witty and cake-loving player from Rikkai University-affiliated Middle School has made him a fan favorite, leading to the release of numerous character songs and even a solo character album and tour.

Takahashi is also prominently recognized for his work within the Digimon franchise, specifically as the voice of Wormmon in Digimon Adventure 02 and its subsequent film appearances, including Digimon Adventure 02: The Beginning and Digimon Adventure: Last Evolution Kizuna. His involvement with the series extends to other related characters like Stingmon and Leafmon.

A significant and recurring collaboration in Takahashi's career is with the Harukanaru Toki no Naka de (Haruka: Beyond the Stream of Time) franchise, a popular series of romance adventure games and anime by Koei. He has voiced multiple characters across the series, demonstrating his vocal range. These roles include Inori in the first game and its anime adaptations such as Haruka: Beyond the Stream of Time – A Tale of the Eight Guardians and Harukanaru Toki no Naka de: Maihitoyo, Isato in Harukanaru Toki no Naka de 2: Shiroki Ryū no Miko, Hinoe in Harukanaru Toki no Naka de 3 and its related animations Owari Naki Unmei and Kurenai no Tsuki, and later, Tōya in the fourth installment. His work in this franchise has made him a regular at the associated live NeoRomance events.

In addition to these hallmark roles, his filmography includes a variety of other characters. He voiced Ruka Gojō in the anime Nanbaka, Minori Shido in the ACTORS: Songs Connection project, Crevaniel in the Growlanser IV OVA, and Atari Maeda in Lovege Chu - Miracle Seiyū Hakusho. He also had a role in the television anime C as Ichiro Horii. Beyond anime, he has been prolific in video games and drama CDs, particularly within the otome game genre, working frequently with companies like Rejet.

Parallel to his voice acting, Takahashi has maintained an active and successful music career. He has released numerous singles and albums under labels like Realize Records, with many of his songs charting on the Oricon charts. His music has been used as theme songs for various anime, including Black Blood Brothers and Muteki Kanban Musume. He is recognized for his powerful vocals and engaging live performances, often incorporating his energetic personality into his shows. His career is also marked by his direct engagement with fans and pioneering use of online fan communities.