The pair were married in a traditional Japanese ceremony on Jan. 22, said Paul Bloch.
This is the fourth marriage for Presley, 38, who previously wed Nicolas Cage, Michael Jackson and Danny Keough. Keough served as Lockwood's best man at the ceremony.
Keough and Presley have two children together, Riley, 16, who was the maid of honor, and Benjamin, 13, who was a groomsman.
Lockwood was Lisa Marie Presley's musical director and is listed as executive producer on her 2005 album Now What.