What is KODENSHI®?KODENSHI® is the temperature retention fiber which far infrared rays radiation acts on in a body temperature range effectively.

The mechanism of KODENSHI® radiation


KODENSHI® alleviates the cold and sustains good health by retaining body temperature.

The best policy for a healthy life is to keep our bodies warm. Because cold temperatures significantly affect our bodies, it is essential to protect ourselves against the cold. KODENSHI® provides a human-body friendly environment that allows to maintain body temperature within the ideal range.

The structure of KODENSHI®

The high-purity ultra-fine ceramics uniformly blended in KODENSHI® fibers, using state-of-the-art technology, has a large surface area that enables efficient absorption and radiation of energy (body heat).  

The ultra-fine ceramic particles, with an average particle size of 0.3 µm, are even finer than cigarette smoke (with an average particle size of 0.5 µm).

Electron microscopic image


Comparison diagram of far-infrared radiation energy


Measurement conditions

Room temperature: 19ºC ± 0.2℃

Humidity: 50% ± 2%

Correction value (ɛ): 0.75

Object distance: 300 mm

KODENSHI® fibers are compared with other fibers of the same composition. KODENSHI® radiates 10% to 20% more energy than that emitted from the palm of the hand (i.e., the human body). Although typical fibers also emit far-infrared radiation in trace amounts, the radiation is lower than that from the palm of a hand (i.e., the human body) and will not work effectively.

Last updated November 18, 2009