Indigo might just be the most universally flattering colour on the planet. And for more than a few years now, indigo-dyed clothing has been a favourite among everyone. If you're a fan of Japanese workwear, you know that this little plant helped launch the denim industry—which, it goes without saying, is no small feat. But by now, the range of deep blue tones achieved with indigo have found their way into just about every corner of the modern man's closets—including tees.

This colorway, known as "Black Indigo," undergoes a yarn-dyeing process with indigo before being subjected to an additional black overdyeing treatment, enhancing the depth of its hue.

Pure Blue Japan is the dream of Kenichi Iwaya. Passionate about denim, he grew up in Okayama and acquired experience working in different mills around the region, until in 1997 he decided to create his own brand. Ever since, Iwaya-San has been obsessed with producing incredible fabrics with unique, slubby textures and a distinct character. This is why he only works with shuttle looms from Ibara, Okayama, using only the best cottons from the United States and India. Since its emergence until today, Pure Blue Japan has consolidated its position as one of the touchstone labels in Japanese Denim, and its excellent work has established it as one of the masters of indigo dye.