A.Y.A is a boutique effects pedal workshop based in Tokyo, Japan, operated by builder Mr. Kawai. A pioneer of domestically produced handmade pedals in Japan, the brand has been active for over two decades, building a loyal following among guitarists and bassists who seek meticulously crafted, small-batch effects. The brand's full name, "AYA Tokyo Japan Custom Shop," reflects its artisanal approach — many units are one-off prototypes or limited "tester" models that pass directly from Kawai's bench to retailers.

A.Y.A's lineup spans a wide range of effects. The Drivesta is among the brand's most recognized designs, a Marshall-voiced overdrive/distortion pedal prized as a "Marshall-in-a-box" gain stage. The R-COMP, inspired by the classic Ross compressor circuit, is known for its warm compression feel and low noise floor. The BM-Fuzz 70 delivers a Big Muff-style fuzz with smooth sustain, while the Front Gate Bass Drive is built specifically for bass players, preserving low-end clarity through the drive circuit. Other notable pedals include the Warm Chorus, Super Atomic Distortion, Desert Rose fuzz/overdrive, vintage-style wah pedals with buffers, filter pedals, tremolo units, and bass preamps. Some products carry the co-brand "Yuki & AYA," though both names refer to the same workshop.

A.Y.A pedals are primarily sold through Japanese instrument dealers — most notably TC Gakki in Tokyo — and appear on the secondhand market via Reverb and eBay. The brand does not maintain a conventional website or public social media presence, which is characteristic of certain Japanese boutique pedal makers who operate through dealer networks and word of mouth rather than direct marketing.

A.Y.A has 1 product cataloged on Equipboard, including Compressor Effects Pedals. Their gear is featured by 1 artist, with the strongest followings in Rock. Notable users include Jacob Petersen.