If Cats Disappeared from the World is fun, but it also makes readers question the meaning of life. It forces us to ponder what life would be like without the things we love. Another theme of the work is the lack of love in the world today. Kawamura feels that people everywhere have become selfish. He hopes his book will remind readers that “you are not just you.” This book is a thoughtful reminder that we are all deeply connected by our relationships and the things we use every day.