Akemi Okamura

No, Akemi Okamura has voiced Nami across the entirety of the One Piece anime since it began airing. She has remained the character's Japanese voice throughout the series' run.

Okamura is best known for voicing Nami, one of the core Straw Hat Pirates, a role she has held since One Piece began. It remains the signature credit of her voice acting career.

Beyond Nami, Okamura has also voiced the characters Su and Cocoa, both appearing later in the story. These smaller roles sit alongside her long-running work as the Straw Hats' navigator.

Alongside acting, Okamura has also pursued music, contributing a song to the long-running NHK program Minna no Uta. It's a side of her career distinct from her voice work in anime.

Okamura's voice acting career stretches back to the early 1990s, with her years active listed as 1992 to the present. She was born in 1969 and has worked continuously in the Japanese anime industry since then.