New, Unopened / High-Quality Moth, Mite, and Mold Repellent Sheet for 8 Tatami Mats, 100 x 380cm, 4 Sheets

Rakuten Site Quote↓↓↓
[Size] 100cm x 380cm, Thickness 0.15mm [Quantity] 4 sheets per pack
[Origin] Made in Japan [Material] Kraft paper. Use under tatami mats, in closets, or in dresser drawers. It has also been used in museums for cultural property protection (IPM). Please do not allow direct contact with cultural properties or documents. *Beware of imitations.
[Active Ingredients] Borate, Boron Compounds (Disodium Tetraborate (DOT)), Non-volatile [Anti-mite Effect] Ingested poison (takes 14-20 days for effect) [Anti-mold Effect] Sterilizing action (not effective against all types of mold) [Impregnation Amount] 5,000mg/㎡
Borate is a non-volatile substance, so its effect lasts semi-permanently. As it is highly water-soluble, if it remains submerged in water for a long time, the borate will leach out of the sheet and its effectiveness will decrease. Please be aware of this.

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Purchased on Rakuten for ￥6,160. Bought in October 2025 but unused and unopened, so selling at a discount.