Modern era (現代, げんだい, "Gendai") is a term used loosely to describe the time period from which Kagome Higurashi originates, 500 years in the future from Inuyasha's search for the Shikon Jewel during the Sengoku jidai. Kagome and Inuyasha are apparently the only people who can travel between the two worlds, which they do through the use of the Bone-Eater's Well. Kagome returns periodically from the past to play catch-up at school, but she eventually leaves it behind permanently to live with Inuyasha.
- The movie Swords of an Honorable Ruler implied demons became extinct around 300 years before the Modern Era. It's possible there was a mass extermination of demons by the human race with the introduction of more advanced technology, or demons simply hid themselves as humanity flourished.
- Modern era on Wikipedia