"The World of Sweet Potatoes: Sweet Potatoes Around the World, The Beginning of a New Food Culture" By Osamu Yamakawa Price: ¥2000 #OsamuYamakawa #Osamu_Yamakawa #Book #Industry/Agriculture/Forestry I've only looked through it briefly since I bought it, so both the cover and the contents are relatively clean. I have other items for sale as well, so please take a look if you're interested. Thank you!