The SS Raifuku Maru (来福丸 (Kyūjitai: 來福丸), Raifuku Maru) was a Japanese Dai-ichi Taifuku Maru-class cargo ship, which was built in 1918 at Kawasaki Dockyard in Kobe, Japan, and owned by Kawasaki Kisen Kaisha, Ltd. On 21 April 1925, it sank in a heavy storm during a voyage from Boston, USA, to Hamburg, Germany, with a cargo of wheat and a crew of 38, all of whom were lost.

Homeric, and the British ship King Alexander, tried to reach Raifuku Maru, but was unable to get close enough to rescue any crew due to the rough seas.

[2] Homeric sent the following message to the Camperdown Signal Station: "OBSERVED STEAMER RAIFUKU MARU SINK IN LAT 4143N LONG 6139W REGRET UNABLE TO SAVE ANY LIVES."

"[4] The source of this quote is unknown, since it isn't included in radio logs or official records of the incident, but appears in many early accounts of Raifuku Maru's sinking.

Popular writers on the Bermuda Triangle, specifically Charles Berlitz[2] and Richard Winer, propagated the myth of the ship's "mysterious" sinking.