Hikari Instruments is a Tokyo-based Eurorack modular synthesizer maker founded by Pikamachi, a self-taught builder with a mechanical engineering background. The company debuted at the Tokyo Festival of Modular in 2014 and has since operated as a small garage-style workshop turning out analog-focused modules and desktop instruments.

The catalog spans utility, sound-source, and sequencing modules including the Duos chaos synthesizer, Monos, Ping Filter, SINE, Triple AD, Atten/Mixer, EUCRHYTHM Euclidean sequencer, QuadSwitch, Analog Sequencer, Limiter, and Pendulum. Designs tend toward experimental, hands-on patching with an emphasis on unpredictable, character-rich analog behavior rather than strict precision.

Hikari modules are distributed internationally through boutique modular retailers such as Clockface Modular, Perfect Circuit, Signal Sounds, and Elevator Sound, and the brand has developed a following within the experimental and Japanese modular scenes.

Hikari Instruments has 10 products cataloged on Equipboard, including Modular Synthesizers. Their gear is featured by 7 artists, with the strongest followings in Electronic, Rock, and Pop. Notable users include risaripa, Kazumoto Endo, and Paul Birken.