The veteran action star and dozens of Hong Kong singers and actors on Thursday recorded the theme song for the concert, "Succumb Not to Sorrow."
The song is based on an inspirational Japanese poem.
Addressing the Japanese victims, Chan said, "You will not be alone. We will always be by your side."
Others attending the recording session include singers Alan Tam, Hacken Lee, Shirley Kwan and Chinese-American rapper Jin.
TV stars Bosco Wong, Myloie Wu and Michael Tse also took part.
Proceeds from the concert at Hong Kong's Victoria Park will go to the Salvation Army.
