There is an interpretation that the Kyushu nengo table of Kyushu dynasty theory (which was nengo historically investigated by Shigenobu TSURUMINE as the nengo of Kumaso [a tribe living in the ancient Kyushu district]) is a kind of Shinengo.
九州王朝説九州年号表（鶴峰戊申が、熊襲の年号として考証した年号）を私年号の一種とする解釈もある。