Nathan “Nate” Adams is 11 years old in most English-language Yo-kai Watch media.
Nate is generally portrayed as an ordinary 11-year-old fifth-grade student. His life changes when he encounters Whisper and receives the Yo-kai Watch, a device that lets him see supernatural beings who are normally invisible to humans. His age places him in the same school environment as Katie Forester and his friends Bear and Eddie.
The wording “most English-language media” matters because Yo-kai Watch has multiple versions, timelines, manga continuities, and later stories. Names and localization choices can change between Japanese and English releases, and some follow-up productions depict characters at different ages or focus on other members of the Adams family. Those variations do not change Nate’s standard profile in the original English-language setting.
Nate is sometimes mistaken for 10, 12, or 13 because he behaves like a broad cartoon protagonist rather than a rigorously aging child. The canonical character description, however, identifies him as an 11-year-old fifth grader. His Japanese name is Keita Amano, while “Nathan Adams” is the localized English name.