Isekai is a Japanese term for a genre in which characters are transported from their own world to a different one, often a fantasy realm. In these stories, a protagonist is summoned or pulled into a new setting where adventure, magic, and combat frequently unfold. The tone can range from lighthearted journeys to darker, more somber quests, reflecting a wide spectrum of storytelling within the genre. The concept has roots in classic fantasy and has grown beyond literature into anime, manga, video games, and web novels, broadening its cultural reach while maintaining a core interest in discovering new worlds and overcoming unfamiliar challenges.