My Recommendation: Yoko Kuroki List Price: 5000 yen, purchased in 2023 I have erased the pencil markings in the workbook sections. Some areas with strong pressure are still slightly readable, but I hope this isn't a concern. I didn't write much, so the workbook sections are relatively clean. It was a helpful guide for raising children. If anyone would like to try it, please do. Thank you for your understanding regarding this used item.