In this review essay, I examine the significance of Conceptual Engineering Manifesto edited by K. Todayama and K. Karasawa, which is the first book in Japan that explores a new field called “conceptual engineering” in collaboration with psychology. After presenting an overview of its aim, distinctive features, and contents, I make general comments on the possibility of the research program proposed in this book, mainly in the following respects: its feasibility as engineering; continuity, function, and nature of concepts. Through discussing, I also articulate further tasks for conceptual engineering to be addressed.