Somewhere between 5th-3rd century BC first information on Eight Extraordinary meridians in Chinese culture was found in the Huangdi internal classic (Huangdi Neijing Su Wen) and Ling Shu beside the 12 Meridians. There are some modern mappings of meridian systems, which resemble these extraordinary lines.
One of them is Japanese meridian system, which connects the so called Keiraku Hikō (Meridian Hidden Points). Here you can see a picture of one among many Japanese meridian maps, covering the so called Keiraku points, which are also known as Hikō, tsubo or pressure points. Frontal bold Keiraku lines are close to Axiatonal lines.