Def Tech is a Japanese pop band signed to 2VOX Ltd, an independent label.

Jesse, the vocalist from Rize, named the band, the members of which did their own songwriting, arranging, and production.

Def Tech had the 3rd best-selling album in Japan in 2005 and performed at Live8 in Tokyo in July of that year.

They rocketed in popularity, especially due to their song "My Way," and their first, self-titled album charted at #1 and went on to sell 2.2 million copies.

That same year (2005), they became the first indie label artist to perform at NHK's Kohaku Uta Gassen.