From a desire to live a comfortable and healthy way of life, our products show a diligence in bringing you all the best characteristics of the unique SASAWASHI. What we take for granted today may become increasingly difficult tomorrow because of our changing environment & lifestyles. What is truly good is that which you will want to use for a lifetime. Our simple designs are a result of an emphasis on comfort and natural feeling while using our products. Strive to be better without changing. Our goal is dedication in creativity.


SASAWASHI is a new fabric woven by twisted Washi yarns that are blended with KUMAZASA.


No other paper in the world is as useful as WASHI - a strong, durable, water-resistant and versatile material with its own beauty. Shoji (sliding WASHI paper doors), for example, keep you cool in hot, humid summers and warm in winter thanks to their humidity control, water absorption, insulation and UV protection. As WASHI can absorb both oil and water, it is used as blotting paper and oil absorbent cooking paper. Absorbing different substances at the same time is especially handy when using SASAWASHI socks and towels.



KUMAZASA is a plant of the gramineae family growing worldwide, particularly in the cool highlands of Japan. This hardy plant can grow for 60 years or more, surviving even harsh, snowy winters. Known for its strong antibacterial properties, it has been used to preserve food such as SASA SUSHI, SASA DANGO (dumplings), and CHIMAKI (rice dumplings), all which are wrapped in SASA leaves. Bears eat large amounts of KUMAZASA before hibernation for its blood purification and detoxification benefits. Studies have shown it to be rich in chlorophyll, polysaccharides, lignin, fiber and vitamin K. Among all KUMAZASA’S benefits, SASAWASHI products focus especially on its antibacterial properties and are produced “as they are” in their natural state.



Here are the four processes of making a SASAWASHI Fabric.



    In the process of making WASHI, KUMAZASA flakes (improved SASAWASHI fiber so that its chlorophyll may not be resolved) are blended into WASHI to make a sheet of SASAWASHI paper.



    Slitting a sheet of SASAWASHI. Slitting means cutting a sheet straight to make a long tape. A narrow paper makes a fine yarn and a wide paper makes a thick yarn.



    Twisting the SASAWASHI tapes to make yarns in the same way as to make strings. By weaving and knitting the SASAWASHI yarns, creating various products become possible.



    By machine-weaving SASAWASHI yarns, a SASAWASHI fabric is made.


There's no other fabric like SASAWASHI, which contains excellent features from "the Power of Nature." Blending the fiber of Kumazasa with Washi gives it natural antibacterial and deodorant power. WASHI is lint-free, light, highly absorbent and provides good UV protection. Washing durability is on par with cotton and the antibacterial properties can be maintained.

  • POINT1 Excellent Absorbency

    Dry and Comfortable Washi

    SASAWASHI absorbs about twice as much water as cotton. It allows moisture to escape and helps you feel dry even after sweating.

  • POINT2 Natural Ant ibiot ic, Deodorant Ef fects

    Clean KUMAZASA

    KUMAZASA’s natural antibacterial properties prevent unpleasant odors.

  • POINT3 Gentle to the Skin

    Naturally derived and Safe

    SASAWASHI is natural. The structure of its fabric has no lint, making it gentle on your skin.

  • POINT4 Washable

    Happy to be washed

    SASAWASHI products are washable in a laundry net. Sheets, pillowcases and other coverings are dryer-free.

  • POINT5 UV protect ion


    SASAWASHI products has an ability to block more than 98% of UV rays without using chemicals.


Here are some of the examples of SASAWASHI’s power of nature.

Antibacterial Effectiveness of KUMAZASA Extract

KUMAZASA extract from KUMAZASA flakes is also proven to possess antibacterial and deodorant properties.

[Shokuhin Kensa Center (Food Hygiene Association)]

Phosphate Buffer Solution:[Inoculation Number]600,000 / [Bacteria Count 18 Hours Later] 2,500,000 |30 times diluted KUMAZASA extract:[Inoculation Number]600,000 / [Bacteria Count 18 Hours Later] 10 or less

Decrease Rate (2 Hours Later)

[BOKEN Hinshitsu Hyouka Kiko
SASAWASHI Sock Deodorant Test Result]

Decrease Rate (2 hours later):[Ammonia]90.8%/[Acetic Acid]95.1%/[Isovaleric Acid]92.8%

Adhesion of SASAWASHI Fabric.

Sweaty/sticky conditions were replicated.
The adhesion of SASAWASHI compared to other fabrics is obviously low.

Imparted Amount of Moisture (ml) line graph

SASAWASHI Fabric UV Blocking Effectiveness

[Nissenken Hinshitsu Hyouka Center (Nissenken Quality Evaluation Center)
Measurement of UV Block Ratio]

[Ultraviolet A] 400mm:98.4% 390mm:98.4% 380mm:98.3% 370mm:98.2% 360mm:98.1% 350mm:98.2% 340mm:98.3% 330mm:98.4% 320mm:98.5% | [Ultraviolet B] 310mm:98.5% 300mm:98.6% 290mm 98.5% | [Ultraviolet C] 280mm:98.5% 270mm:98.5% 260mm:98.5% 250mm:98.5% 240mm:98.5% 230mm:98.6% 220mm:98.6% 210mm:98.7% 200mm:98.7%