"Revised 10th Edition Environmental and Social Certification Test® eco-test Official Textbook" Tokyo Chamber of Commerce and Industry / Tokyo Chamber of Commerce and Industry Price: ¥2600 #Tokyo Chamber of Commerce and Industry #Tokyo Chamber of Commerce and Industry #Book #Civil Engineering/Architecture/Civil Engineering "2025 Edition Environmental and Social Certification Test eco-test Official Problem Collection" Tokyo Chamber of Commerce and Industry Price: ¥2200 #Tokyo Chamber of Commerce and Industry #Book #Civil Engineering/Architecture/Civil Engineering There are some minor scratches and stains here and there, but the contents are clean without any writing, so I think there will be no problem studying. The digital drill attached to the official problem collection has been opened and cannot be used."