Japan’s electroacoustic vanguard reconvene for their second album proper, once again shining light on previously unoccupied space somewhere between Arthur Russell and Autechre.

»KAK« is the next stage of KAKUHAN’s evolution, seemingly self-titled but hiding plenty of clues if you understand Japanese. »KAK« can evoke a number of different characteristics: edge or angularity, core, expansion, agitation or absence. The duo meditate and refract these guiding principles over nine tracks (and a bonus digital addendum) with their usual focus on the interplay between man and machine – something Hino's been exploring for many years with both his solo work as YPY, and with his pioneering band, goat (JP).

Working with electronics (drum machines, samplers, oscillators) Hino infuses weightless rhythms with rare fluidity, as if tracing an algorithm trained on Milford Graves. His rubbery, bio-mechanical outbursts are formed into jagged, continuum-confusing trajectories - prismatic spaces where grime intersects footwork and jersey club, and drill corkscrews thru gagaku and Americana.

Yuki Nakagawa's emphatic improvisations are just as mind-altering. While he holds back at first, accenting Hino's rapid-fire sequences with hollow, resonant scrapes and junked Downtown distortions, he eventually edges further towards centre stage. Featherlight cello squeals are elongated, imagining a decelerated hoedown, angling folk-y, ecstatic shapes while Hino responds with drum machine prangs. Soon, the duo skewer nervy baroque ornamentation with clockwork whirrs that trip over themselves, the insectoid rhythmic fractals gradually scuttling around a droning cello.

By the end of the album, the duo have somehow completely switched roles; Hino's grey boxes now sounding as if they've been excavated from ancient ground, while Nakagawa's strings throb with cybernetic energy, beamed in from a far dimension.