They say Sompo's predecessor, Yasuda Fire & Marine Insurance, acquired the painting "in reckless disregard of its provenance, including Mendelssohn-Bartholdy's forced sale of the painting in Nazi Germany in 1934". "Sompo Holdings wrongfully has employed the Painting to reap billions of dollars of unjust enrichment through a sophisticated branding strategy," the lawsuit said. "Defendants have commercially exploited as a corporate emblem what they long have all but known was a Nazi-tainted artwork." But Sompo Holdings defended its ownership of the painting in a statement to AFP on Tuesday, saying it "categorically rejects the complaint's allegations of wrongdoing". The company "intends to defend its ownership rights in 'Sunflowers vigorously'", Sompo added.