Takeharu was a guitar brand produced by the Kiso Suzuki Violin Company of Japan, based in the Kisofukushima region. The company, founded by luthier Kiso Suzuki with roots in violin making dating back to the early 1950s, branched into guitar production in the 1970s and built instruments under the Takeharu name through the end of that decade. The brand reportedly took its name from Yamamoto Takeharu, a Japanese guitarist and composer.

The lineup covered steel-string acoustics, classical guitars, electrics, and basses, with designs that drew visible inspiration from Martin dreadnoughts on the steel-string side. Model designations typically used letter-and-number codes such as the WT-250, WT-300, WK-150, WK-300, and GT-300, with the GT500 generally regarded as the top-of-line classical. Higher-spec builds featured appointments like rosewood bodies, bone nuts and saddles, and abalone inlay work.

Kiso Suzuki ceased operations in the early 1980s, and Takeharu instruments are now encountered primarily on the vintage market, where they have a small following among collectors of 1970s Japanese-made acoustics and classicals.

Takeharu Guitar has 2 products cataloged on Equipboard, including Steel-string Acoustic Guitars and Solid Body Electric Guitars.