Voice actor Kyousei Tsukui revealed on his blog and Facebook page on Tuesday that he has been diagnosed with amyotrophic lateral sclerosis (ALS). Tsukui underwent four weeks of medical testing and treatment with hospitalization before receiving the diagnosis.

Tsukui stated that while the symptoms of ALS may be severe, they vary by the individual. Tsukui's voice is currently unaffected, and he plans to "continue forward as much as possible" with the support of his agency and family. Walking on his own is now difficult for Tsukui. He uses a double-handle cane and wheelchair to aid with mobility, but he said that he is otherwise relatively healthy. Tsukui plans to keep working with various doctors and therapists.

Tsukui's major roles in anime include Black Blood Brothers ' Johan Tsang, Azuki-chan 's Makoto Sakaguchi, Fantasista Doll 's Rinto Mikasa, s-CRY-ed 's Straight Cougar, Tamako Market 's Chō ji Yumoto, Psychic Force 's Keith Evans, Zombie-Loan 's Hakka, and Teenage Mutant Ninja Turtles: Legend of the Supermutants ' Bebop.