The block is "Pieced Raimon (Spiral)" from Susan Briscoe's Japanese Quilt Blocks to Mix and Match (a book I just love!), scaled down a smidge to 8" finished and paper-pieced. Structurally, it's a plain old Courthouse Steps, although it looks more exotic because of the fabric layout. The red check is printed on the square, so I sliced the strips at varying angles for each round to force some contrast between the regularity of the block and the created wonkiness of the fabric.
This is actually the third version of this block I've made. The first one was a scrappy "proof of concept", and I meant the second to be my entry, but I just didn't love it (I'll post a pic of that one separately so as not to confuse the entry.) I found some nice oriental fabric, and a solid that coordinated, but somehow, it wasn't grabbing me. I'm still not sure why -- need to ponder some more on that.