I'm selling these items because I passed the exam. The problem book has a lot of writing in it. For the complete preparation guide, I remember writing corrections in areas where there were errors compared to the official version. I couldn't find them all, but there may be some markings. The problem book is quite well-used. The complete preparation guide is relatively clean. These are not new. Both are used items, so please understand before purchasing. Please refrain from purchasing if you are sensitive to this. I will also include the exam questions distributed on the day of the 2025 exam (with writing). #Blaster #Explosives #Explosives Handling Safety Supervisor #Kagawa Book