Motoko Kumai is a Japanese voice actress, or seiyuu, born on September 8, 1970, in Tokyo, Japan. She is affiliated with the talent management firm 81 Produce. Kumai is widely recognized for her distinct and energetic voice, which she has lent to a vast number of anime series, films, and video games since her debut in the mid-1990s. She is particularly celebrated for her portrayals of young male protagonists, a specialty at which she has become highly regarded, often mentioned alongside other notable female voice actors known for boy roles. A holder of a large motorcycle license and an English teaching license, her hobbies include touring and bird watching.

Kumai's career includes two of the most iconic roles in 1990s and 2000s anime. She is the voice of Syaoran Li in the globally popular series Cardcaptor Sakura and its sequel, Cardcaptor Sakura: Clear Card. She also voiced the lead role of Takao Kinomiya, known as Tyson Granger in English adaptations, in the long-running franchise Beyblade. These two characters cemented her reputation as a leading voice actor for spirited and determined young heroes.

Her filmography demonstrates a remarkable range and longevity, encompassing a wide variety of characters across different demographics. She has had a recurring role as the boar child Noshishi in the long-running Kaiketsu Zorori franchise, appearing in numerous television series and films, including the 2022 movie Kaiketsu Zorori: Lalala♪ Star Tanjō. In the magical girl genre, she has played Coffret in the Heartcatch Precure! series and its associated All Stars films. She also voiced the robotic Sumomo in Chobits, Gon the dinosaur in the CG anime Gon, Hunter Steele in Spider Riders, and Kocchi in Chi's Sweet Adventure.

Kumai has notable recurring collaborations with the creative manga artist group Clamp, having voiced characters in multiple adaptations of their works. Besides her most famous role as Syaoran in Cardcaptor Sakura, she played Sumomo in Chobits, Nataku in X/1999, and Keita Yoshimura in Kobato. She also has a long association with the Kaiketsu Zorori franchise, consistently voicing Noshishi across various series and films for many years alongside regular co-stars Kōichi Yamadera and Rikako Aikawa. Her voice work extends beyond anime to include Japanese dubs of foreign films and television series, where she has voiced characters such as Cory Matthews in Boy Meets World, Gibby in iCarly, and Spike in My Little Pony: Friendship Is Magic.

From December 2006 to October 2007, Kumai took a hiatus from her career to receive medical treatment for an illness. She successfully returned to voice acting and has continued to be active in the industry. In addition to her voice work, she has performed theme songs, such as the first opening theme Go Ahead for Beyblade G-revolution, and has hosted a radio show. Her body of work is extensive, with credits including roles in Hunter x Hunter (2011), JoJo's Bizarre Adventure: Stardust Crusaders as Boingo, Gintama, and various films and video games like the Final Fantasy series.