Together with the head of our lab, professor Araki, and two of my Polish colleagues we wrote our first book in Japanese: Kenji Araki, Rafal Rzepka, Michal Ptaszynski and Pawel Dybala, "AI with Empathy: language, emotions, ethics, humor, common sense" (心を交わす人工知能: 言語・感情・倫理・ユーモア・常識), Morikita Publishing House, 2016. More details (in Japanese), can be found here.