コクヨ 厚紙 A4 100枚 LBP-F31

KOKUYO (コクヨ) is a well-known Japanese stationery manufacturer that produces a variety of office supplies, including thick paper (厚紙) products. The product you mentioned, "LBP-F31," appears to be a pack of A4 thick paper containing 100 sheets.
This type of paper is typically used for printing, crafting, or other applications where thicker paper is necessary for durability or a more professional finish. The code "4901480593661" is likely the product's barcode, which can be helpful for identifying the product in stores or online.
If you are looking for more specific information about the product, such as its weight, thickness, or recommended uses, please let me know!