From the Super Mario Wiki
Mahito Yokota (横田 真人, Yokota Mahito) is a Japanese composer at Nintendo's EAD Tokyo Studio. He is most known for being in charge of the composition for Donkey Kong Jungle Beat and his collaboration with other Nintendo staff for writing musical scores for Super Mario Galaxy, Super Mario Galaxy 2, Super Mario 3D Land, New Super Mario Bros. U and Super Mario 3D World. He has also been confirmed to contribute to the music composition of Super Smash Bros. for Nintendo 3DS.
Songs composed by Yokota