Tomoko Ninomiya ,(Ninomiya Tomoko, born May 25, 1969) is a Japanese manga artist, based in Saitama Prefecture, Japan. In 1989, she made her debut with London Doubt Boys.

She is best known for her series Nodame Cantabile, which received the 2004 Kodansha Manga Award for shōjo manga. Nodame Cantabile has been adapted for television as both a live-action drama broadcast in 2006 and 2008 and as 2010 there has been 3 anime seasons.

Popular piano student Shinichi Chiaki has almost given up his dream of becoming a conductor because his international career prospects are crippled by his fear of flying, and his despair affects his playing. After he is dropped by his instructor, Chiaki gets drunk and passes out on his doorstep. He is taken in by his eccentric neighbor, Megumi "Nodame" Noda, who plays piano in a beautiful cantabile style but is frighteningly messy. Chiaki is transferred to an instructor who specializes in failing students, Hajime Tanioka, and is horrified to learn Nodame is also his student. When the smell of Nodame's apartment becomes too much for Chiaki, he cleans it, and Nodame improvises a sonata for him. Tanioka assigns Chiaki and Nodame a Mozart sonata for two pianos, and Chiaki quickly learns that Nodame is a bad sight reader, preferring to learn by listening.