This is a natural, solid wood cutting board made from a well-dried piece of wood from a tree that is several hundred years old. No coating materials such as oil have been used. I don't know what kind of wood it is m(_ _)m I'm sure it's a very special wood, but it's not kaya wood, and I don't think it's Aomori Hiba either... I would be happy if restaurants with counters or cooking researchers would use it. Important points ☆ Before use, wet the front and back thoroughly with water and rub it by hand to spread the water over the cutting board. ☆ After use, wash it thoroughly and rinse the back as well. ☆ Please clean and use it with water or lukewarm water (about the temperature of tap water in summer). This can cause the cutting board to warp. ☆ If the cutting board warps, wet the concave side, one side, with water or lukewarm water and lean it against something to let it absorb moisture. ☆ Do not use bleach or other chemicals. Wood is a natural material and is not resistant to chemicals such as bleach. This can cause blackening and discoloration, so avoid using chemicals for sterilization, disinfection, or bleaching. ☆ Do not expose to direct sunlight. Exposure to direct sunlight can cause warping and distortion due to temperature changes and drying. Please store it in the shade. ☆ We recommend cleaning with a scrubbing brush after use. Please judge the size of the cutting board from the photos m(_ _)m I had listed this before, but I took it down when I was hospitalized. I had written the product number on masking tape and stuck it on, and when I took the photos this time, there are traces of the masking tape in the fourth photo m(_ _)m I think it will come off if you scrub it with a scrubbing brush and dish soap m(_ _)m Please take a look at my profile if you like. It's been a while since I've listed anything, but for some reason the shipping origin and shipping method fields are not displayed, so they are listed as "undecided." The shipping origin is Aichi Prefecture. #Sepia'sRoom