Maebashi Futagoyama Kofun (前橋二子山古墳) is a Kofun period burial mound located in the Bunkyocho neighborhood of the city of Maebashi, Gunma Prefecture in the northern Kantō region of Japan.

[1] It is also sometimes referred to as the Amagawa-Futagoyama Kofun (天川二子山古墳).This tumuli appears in the poem "Futagoyama" by Sakutaro Hagiwara.

The remains of a 35-meter moat were discovered in an archaeological excavation in 1980 and in 1994, and an analysis of the soil covering the moat found that it contained volcanic ash from an eruption which occurred in the middle of the 6th century AD, indicating that the tumulus was built around the start of the sixth century.

Although the detailed structure of the mound has not been investigated yet, it is believed that the burial chamber was opened in antiquity and has since collapsed.

[2] Media related to Maebashi Futagoyama Kofun at Wikimedia Commons