CastI Became the World’s Strongest Witch
The World’s Strongest Witch casts Nana Mizuki as world-tree spirit Yggdrasil ahead of October 7 premiere
Nana Mizuki joins the story of a girl who can search the world using an “Internet” skill. An episode-one synopsis and details of an October 3 livestream have also arrived.
animecca editorsUpdated October 24, 2026
Nana Mizuki will voice the world-tree spirit. On September 30, the official site announced her as Yggdrasil in the TV anime The World’s Strongest Witch. Broadcast begins Wednesday, October 7.
Episode 1’s story
A synopsis and preview images were also released for episode 1, “I Tried Using the Internet!” The heroine is Rona, a 15-year-old cast out because her skill is considered useless.
But the “Internet” skill lets her search and view everything in her world, making it a god-tier ability. Her story begins there.
Pre-premiere livestream
A roughly 40-minute livestream, “The Broadcast-Start Waiting Room Is Here,” begins on Pony Canyon’s official anime YouTube channel Saturday, October 3 at 7:00 p.m. Azusa Tachibana, the voice of Rona, joins Honoka Inoue as Erna and Maria Naganawa as Lulu.
The TV premiere is Wednesday, October 7 at 10:00 p.m. on TOKYO MX and other channels. Streaming was planned for d Anime Store, ABEMA, and other services as of animecca’s October 1 check.

