The Melancholy of Haruhi Suzumiya, created by Nagaru Tanigawa in 2003, is a popular light novel series and anime that explores themes of existentialism, time travel, and alternate realities.

The Japanese river otter, once common throughout Japan, is now extinct due to habitat destruction and hunting.

In Japan, there is a cat island called Tashirojima where there are more cats than people.