Amanaki Taiyo Lotoahea

is a Tongan-born Japanese rugby union footballer who plays as either a fullback or a wing.

Lotoahea played for the Ricoh Black Rams having joined them in 2014. He was initially named in the first ever squad to compete in Super Rugby from the 2016 season, but was later dropped from the squad after sustaining an injury. He left the Black Rams, along with twelve other players, at the end of the 2024-25 season.

Lotoahea was arrested on suspicion of assault in March 2026, following a street altercation in Shibuya in which he was accused of repeatedly striking a restaurant worker in the face. His contract with the NEC Green Rockets was terminated several days after the incident.