E. Matsumoto was a Human Starfleet officer in the 22nd century.
In January of 2155, he was named as a TELMU officer on directory placards at Starfleet Command's Fleet Operations Center, Sol Sector. His office was located in room #1137. (ENT: "Demons", directories)
This character was only mentioned in writing.
He was named after Enterprise assistant production coordinator Eric Matsumoto.