Gaku Hamada is a Japanese actor and voice actor born on June 28, 1988, in Tokyo, Japan. He began his career in entertainment as a child actor in 1998 and is primarily known for his extensive work in live-action television dramas and films. Hamada is represented by the talent agency Stardust Promotion. While his career is predominantly focused on on-screen roles, he has also contributed his voice to a number of notable anime and animated films.

In the realm of animation, Hamada has taken on a variety of character roles. He voiced the character Mirai in the 2022 animated film DEEMO Memorial Keys, an adaptation of the popular music rhythm game. Mirai is a stuffed cat and the leader of three dolls who befriend the protagonist, Alice, after she falls into a mysterious castle. Hamada described his character as having a cute appearance but a sharp tongue, and he approached the role with the intent of giving his character a sense of importance.

Prior to this, he lent his voice to the 2018 film Pokémon the Movie: The Power of Us, where he played the role of Toren, a timid scientist who helps the citizens of Fula City. Another of his voice credits is in the 2020 Studio Ghibli 3D CG animated film Earwig and the Witch, in which he voiced Thomas, a talking cat who becomes an ally to the protagonist, Earwig.

Hamada's filmography also includes the 2015 animated film Miss Hokusai, where he provided the voice for the character Zenjiro, who is also known as the artist Keisai Eisen. Additionally, he appeared in the 2015 film Tensai Bakavon ~Yomigaeru Flanders no Inu~, voicing the character Kōhei Nishigawachi, a classmate of the main character Bakabon.

Across his various projects, Hamada has collaborated with prominent animation studios, including Studio Ghibli for Earwig and the Witch, and Production I.G and Signal.MD for Miss Hokusai and DEEMO Memorial Keys. He has also shared voice credits with renowned Japanese voice actors such as Kōichi Yamadera in both Pokémon the Movie: The Power of Us and DEEMO Memorial Keys. Hamada's contributions to voice acting are an extension of his broader acting career, bringing his experience as a performer to a range of animated characters.