すみっコぐらし塗り絵ブックSumikko Gurashi Coloring Book: Lesson IncludedDesigned by a doctor to help you relax and reduce stress through simple art.
リラックマ ごゆるり楽しい塗り絵ブックRilakkuma: Relaxing and Fun Coloring BookDesigned by a physician to help balance your autonomic nervous system.
なぞりがき百人一首Tracing Hyakunin IsshuRelaxing with colors offers a similar meditative effect to tracing characters.
サンリオキャラクター塗り絵ブック Smile! 新装版Sanrio Character Coloring Book Smile! New EditionPerfect for relaxation, this book helps soothe your mind through simple coloring.