Bacchus is a Japanese guitar and bass brand owned by Deviser Co., Ltd., based in Matsumoto City, Nagano Prefecture — a region long associated with high-end Japanese instrument building. The brand was launched in the early 1990s and is built around classic body shapes inspired by Fender and Gibson designs, executed with the precision Matsumoto luthiers are known for. Higher-end Bacchus instruments are assembled at the Aska Factory, where Deviser also produces its Momose line.

The lineup is divided into tiers that span a wide price range. The Handmade Series sits at the top, built by hand in Japan with carefully selected tonewoods and nitrocellulose finishes, while the Craft Series and Japan Tune-Up Series offer more accessible Japan-assembled options. The Global and Universe Series cover entry-level and overseas-produced instruments aimed at beginners and intermediate players. One distinguishing trait of the brand is its use of in-house pickups and electronics on many models, which is uncommon among mid-tier Japanese builders.

Bacchus is best known for its T-style, S-style, and offset guitars, as well as its Jazz Bass and Precision Bass-style instruments, often praised in player communities for build quality that punches above their price point. The brand maintains a presence outside Japan through regional distributors in Europe, Southeast Asia, and the Americas.

Bacchus has 26 products cataloged on Equipboard, including Electric Basses and Solid Body Electric Guitars. Their gear is featured by 6 artists, with the strongest followings in Rock, Funk / Soul, and Jazz. Notable users include Natsuko Miyamoto, Davie504, and Laura Cox.