Linked from
The 15 pages that link to Nengō, each with the reason it gives.
Tenpyō-hōjiRelated: Tenpyō-hōji belongs to the nengō system and gives its years their period label.
TenryakuRelated: Tenryaku is a nengō, the name used to identify this decade.
Tenpyō-jingoRelated: Tenpyō-jingo is a nengō, and its years are counted within that system.
TentokuRelated: Nengō is the Japanese term for the era-name system that includes Tentoku.
JōheiRelated: Jōhei is a specific nengō, with its own numbered years.