The Amabe clan genealogy (海部氏系図, Amabe-shi Keizu) is a famous document housed at Kono Shrine. It is from early Heian period, it is considered the oldest family tree in Japan. The clan claims descent from Amenohoakari, and served as at the kuni no miyatsuko of Tanba Province before it was divided into Tamba and Tango. The document records 82 generations of descent from Amenohoakari. It was designated a National Treasure in 1972.[1]
However, Toshio Hoga argues that Amabe clan genealogy, which records these four clans as descendants of Amenohoakari, is a forged document,[4] and that these clans actually descended from the sea deityWatatsumi. In addition, Owari clan's genealogy includes the great-grandson of Watatsumi, Takakuraji, as their ancestor, and he argues this is the original genealogy.[5]
^Hoga, Toshio (2006). Kokuho「Amabe-shi Keizu」he no gimon, Kokigi no Heya (国宝「海部氏系図」への疑問 古樹紀之房間). Japan.{{cite book}}: CS1 maint: location missing publisher (link)
^Hoga, Toshio (2006). Tango no Amabe-shi no Shutsuji to sono ichizoku, Kokigi no Heya (丹後の海部氏の出自とその一族). Japan.{{cite book}}: CS1 maint: location missing publisher (link)