Look up Tenno or tenno in Wiktionary, the free dictionary.

Tennō (天皇) is a Japanese word for the Emperor of Japan.

Tenno may also refer to:

• The Japanese Emperor butterfly Sasakia charonda.
• Tenno, Trentino, a municipality in Italy
• Tennō, Akita, a town in Japan
• Hayden Tenno, the antiheroic protagonist of the 2008 video game Dark Sector
• The name given to player-controlled characters as a whole in the video game Warframe