I admit, it's kind of strange to describe math rock tracks as 'jams'. The word 'jam' implies that a bunch of muso's can pick up instruments and follow along to a common pulse of sound. The dissonant nature of math rock surely makes this simple affair rather awkward and complex, maybe even impossible.
Tom Waits once sang "I got the clouds but not the sky, I got the stripes but not the tie, but hey, I'm big in Japan". That's what Delta Sleep are probably saying right now. We can only assume that, in the final days of their Japan tour, punters have taken a shine to their beautiful blend of math rock tinged indie.