I've opened the package and used a few sheets, but the paper is in beautiful condition with no deterioration. There is approximately 480g in total (including packaging). * The top row, left three, were purchased at a 100-yen shop and are of standard origami paper quality. * The top row, right one, was purchased at MUJI and is washi paper. * The bottom row is a set of washi paper called "Kamikaze-sen" from Nishino Shokai, an Echizen washi paper manufacturer. *The packaging bag has been discarded, so it is stored in a zipper bag.*