100% linen, specially made by Olympus Thread Mfg. Co. for kogin (counted sashiko). Also great for cross stitch and other counted embroideries. Now available in several colours by the 1/2m - this listing is for white, shade 1006. 
 
Size 46 x 50cm.
NB - sold by the half metre, so please order ‘1’ for half a metre, ‘2’ for 1 metre etc.
Made in Japan.
Handwash.  Do not dry clean or tumble dry.
 
Also available precut in natural 1000, mustard 1041, blue 1007, and dark indigo blue 1014, and by the 1/2m in blue 1007. 
Susan's comment - 'Although this is the slightly finer of the two Olympus Thread Mfg. Co. kogin fabrics, I find it is easier to stitch because the holes are slightly larger and the threads finer than the 18 count evenweave cotton fabric. It has a more "handmade" look than the 18 count.  Suitable for our kogin thread, or DMC or Anchor Soft Cotton. My favourite kogin fabric, and Olympus Thread Mfg. Co. introduced the colours on my request!'
Translated from Japanese information -
Notes on linen cloth. 100% linen fabric that takes advantage of the natural texture. Linen fabric produces black and brown knots and slubs.  Please note that you may break the thread if you try to stitch too forcefully. There may be a slight error in the thread count number due to unevenness in the weave and thread. Please understand that this is a perculiarity of linen fabric including a feeling of wrinkles and distortion. if the cloth is slightly distorted, please pull the cloth square before starting to stitch.  Please be aware that the cloth ends unravel easily*.
 
Susan's tip - * zigzag or oversew the edges of the fabric before starting to stitch, to prevent fraying.