Ban Dainagon Ekotoba (伴大納言絵詞, "The Tale of Great Minister Ban") is a late 12th-century emakimono (handscroll painting) depicting the events of the Ōtemmon Conspiracy, an event of Japan's early Heian period. The painting, attributed to Tokiwa Mitsunaga, is over 20 m (66 ft) long and about 31.5 cm (12.4 in) tall.