JMT Synth is a boutique Japanese synthesizer maker founded by Tetsuji Masuda. The instruments are hand-built and hand-wired using discrete analog circuitry, with an emphasis on drone, noise, and experimental sound design rather than conventional melodic synthesis. Each unit is produced in small quantities and often varies slightly from the next, giving the line a distinctly handmade character.

The catalog centers on desktop noise boxes and standalone analog synthesizers such as the LD-1 and LD-2 drone/noise synths, the NDE-1, the DNVO-1 and UNVO-1 oscillator-based noise units, the TVCO-2, the NF-2 noise synth, the RVO-3, and the SRV-2 reverb. Many units include patch points that allow integration with Eurorack and other modular systems, and the maker is known for accommodating custom requests and modifications.

JMT Synth has developed a following within the international noise and experimental electronic music community, with coverage on sites like MATRIXSYNTH, Synth Anatomy, and MOD WIGGLER, and distribution through specialty dealers such as SchneidersLaden in Berlin.

JMT Synth has 4 products cataloged on Equipboard, including Multi Effects Pedals and Modular Synthesizers. Their gear is featured by 2 artists, with the strongest followings in Rock and Electronic. Notable users include Gerard Way and Tony Wolski.