Boris with Michio Kurihara Return to Rainbow with Two Side-Long Pieces Drawn from the Box Set

Rainbow, the 2006 collaboration between Boris and guitarist Michio Kurihara, always felt like a record suspended in its own gravity. Heavy without forcing itself, it drifted somewhere between slow-motion psychedelia and the warm hum of a tube amp late at night. That album has now gained a companion. Rainbow 2 collects two side-long pieces originally buried in the Rainbow box set, a release that’s been out of print for years.

The material isn’t exactly new, but its return to circulation matters. These tracks push deeper into the territory the original mapped. Spacious drones stretch out, low-end pulses anchor the weight, and the dual guitar lines of Boris and Kurihara tangle in that hazy, unhurried way that made Rainbow stand apart in the first place. There’s no rush to resolve anything. The pieces breathe and billow.

For anyone who missed the box set, or for those who wore out the original album and wanted more from this exact intersection of players, Rainbow 2 is a quiet correction. It restores a slice of the group’s most transportive period without fanfare. No added gloss, no revisionist mix. Just two long-form cuts that deepen a world already built.