Japonica Study Notebook Showa Note 5mm Grid Notebook A4 Size 2 Green notebooks 2 Yellow notebooks Total of 4 notebooks. Retail price is 319 yen. For 4 notebooks, the regular price would be 1276 yen. Space Series, supervised by JAXA There are space-related columns inside. This is A4 size, so it is larger than a standard B5 size notebook. Bellmark participating product Recommended product by the Japan PTA National Council