
Quick answer — You Oizumi voices Hershel Layton in Professor Layton and the Eternal Diva, Ki-Kima in Brave Story, Kakashi no Kabu in Howl‘s Moving Castle and 1 more characters.
You Oizumi voices Hershel Layton (Professor Layton and the Eternal Diva), Ki-Kima (Brave Story), Kakashi no Kabu (Howl‘s Moving Castle), Tatara (The Boy and the Beast).
Hershel Layton is voiced in Japanese by You Oizumi.