Japanese has a reputation for being an ambiguous language, and it may be true, but it also becomes very accurate. With this book I do not intend to collect words that refer to customs of Japanese culture and that, as they are untranslatable, we have all adopted (kimono, sushi, bonsai, geisha ...), but to collect unique words that illustrate emotions, objects and events that we have all experienced but until now we did not know how to call them. Perhaps if we knew all languages, we would know ourselves and the world around us better.