His birthyear and age of death are given variously by sources (Sasano (1943), p. 23). He was born Ōei 12 (1405) and died 1470 in according to the oldest surviving genealogical document, dating to the early Edo period (Araki (1964), p. 21). According to one of the Hachirokurō genealogies, he was born Meitoku 4 (1393, and died Bunmei 2, year of "metal rat", 1471, but that year was not the year of the rat, hence possibly miscopied from Bunmei 12 or 1481 (Fujita 1934, pp. 283–). Fujita, Tokutarō (藤田徳太郎) (1934) [1929], Kodai kayō no kenkyū [Study of ancient songs], Kinseidō, pp. 283–332; originally published as Fujita (1929), "Kōwakamai no ryūso to kyokumoku ni tsuite" , Kokugo to Kokubungaku9, pp. 28–53 (in Japanese)
Araki 1964, p. 121 :"1 is set in the mythological era, 8 in various periods between the 7th and 16th centuries". Araki, James T. (1964), The Ballad-drama of Medieval Japan, Los Angeles: University of California Press
Araki 1964, p. 121 : "Forty of the [fifty] pieces are set in the [Gempei War period (Genji vs. Heike war)] 1160-1193". Araki, James T. (1964), The Ballad-drama of Medieval Japan, Los Angeles: University of California Press
Araki 1964, p. 121 : "there are 7 which concern the.. vendetta of the Soga brothers". Araki, James T. (1964), The Ballad-drama of Medieval Japan, Los Angeles: University of California Press
In the Kowaka keizu no koto, the opening paragraph describes Naotsune's heir Naokazu (who died 1370), and his son "Naotada" got his wife from Kyoto pregnant; she later gave birth to Naoaki (Kōwakamaru) in Hozenji Village, Nyū district (Sasano 1943, pp. 191–192). Sasano, Ken (笹野堅) (1943), Kōwaka bukyoku shū: jobun (幸若舞曲集 序文) [Collection of Kōwaka musical dances: foreword], Dai-ichi Shobō (in Japanese)— "Sasano I"
Sasano, Ken (1943b). Kōwaka bukyoku shū: honbun (幸若舞曲集 本文) [Collection of Kōwaka musical dances: main text]. Dai-ichi Shobō. (in Japanese)— "Sasano II"
His birthyear and age of death are given variously by sources (Sasano (1943), p. 23). He was born Ōei 12 (1405) and died 1470 in according to the oldest surviving genealogical document, dating to the early Edo period (Araki (1964), p. 21). According to one of the Hachirokurō genealogies, he was born Meitoku 4 (1393, and died Bunmei 2, year of "metal rat", 1471, but that year was not the year of the rat, hence possibly miscopied from Bunmei 12 or 1481 (Fujita 1934, pp. 283–). Fujita, Tokutarō (藤田徳太郎) (1934) [1929], Kodai kayō no kenkyū [Study of ancient songs], Kinseidō, pp. 283–332; originally published as Fujita (1929), "Kōwakamai no ryūso to kyokumoku ni tsuite" , Kokugo to Kokubungaku9, pp. 28–53 (in Japanese)
Sasano gives a list of records of performances. Some refer to just the "two person dance". One record from Meiō 6 (1497) explicitly states that kōwakamai was a two person dance (Sasano 1943, p. 71). Sasano, Ken (笹野堅) (1943), Kōwaka bukyoku shū: jobun (幸若舞曲集 序文) [Collection of Kōwaka musical dances: foreword], Dai-ichi Shobō (in Japanese)— "Sasano I"
Sasano, Ken (1943b). Kōwaka bukyoku shū: honbun (幸若舞曲集 本文) [Collection of Kōwaka musical dances: main text]. Dai-ichi Shobō. (in Japanese)— "Sasano II"
Sasano, Ken (1943b). Kōwaka bukyoku shū: honbun (幸若舞曲集 本文) [Collection of Kōwaka musical dances: main text]. Dai-ichi Shobō. (in Japanese)— "Sasano II"
Kōwaka kakeizu (family tree), of the Kowaka Kohachirō branch of the family, early Edo period, once owned by Momoi Hiroshi(?) (桃井豁) (Sasano 1943, pp. 164–165). Sasano, Ken (笹野堅) (1943), Kōwaka bukyoku shū: jobun (幸若舞曲集 序文) [Collection of Kōwaka musical dances: foreword], Dai-ichi Shobō (in Japanese)— "Sasano I"
Sasano, Ken (1943b). Kōwaka bukyoku shū: honbun (幸若舞曲集 本文) [Collection of Kōwaka musical dances: main text]. Dai-ichi Shobō. (in Japanese)— "Sasano II"
Sasano, Ken (1943b). Kōwaka bukyoku shū: honbun (幸若舞曲集 本文) [Collection of Kōwaka musical dances: main text]. Dai-ichi Shobō. (in Japanese)— "Sasano II"
Sasano 1943, pp. 58–59, citing Meiryō tairoku (1814), a record of the Shogunate ranks and professional duties. Sasano, Ken (笹野堅) (1943), Kōwaka bukyoku shū: jobun (幸若舞曲集 序文) [Collection of Kōwaka musical dances: foreword], Dai-ichi Shobō (in Japanese)— "Sasano I"
Sasano, Ken (1943b). Kōwaka bukyoku shū: honbun (幸若舞曲集 本文) [Collection of Kōwaka musical dances: main text]. Dai-ichi Shobō. (in Japanese)— "Sasano II"
Sasano, Ken (1943b). Kōwaka bukyoku shū: honbun (幸若舞曲集 本文) [Collection of Kōwaka musical dances: main text]. Dai-ichi Shobō. (in Japanese)— "Sasano II"
Forty-two passed down in the Kohachirō branch, according to the Kōwaka keizu no koto document (Sasano 1943, pp. 160–161). Sasano, Ken (笹野堅) (1943), Kōwaka bukyoku shū: jobun (幸若舞曲集 序文) [Collection of Kōwaka musical dances: foreword], Dai-ichi Shobō (in Japanese)— "Sasano I"
Sasano, Ken (1943b). Kōwaka bukyoku shū: honbun (幸若舞曲集 本文) [Collection of Kōwaka musical dances: main text]. Dai-ichi Shobō. (in Japanese)— "Sasano II"
Two of the Hachirokurō branch genealogies, under entry for Tadatsugu, state 6 pieces were set to tune beside the 36 (Sasano 1943, pp. 100–101). Sasano, Ken (笹野堅) (1943), Kōwaka bukyoku shū: jobun (幸若舞曲集 序文) [Collection of Kōwaka musical dances: foreword], Dai-ichi Shobō (in Japanese)— "Sasano I"
Sasano, Ken (1943b). Kōwaka bukyoku shū: honbun (幸若舞曲集 本文) [Collection of Kōwaka musical dances: main text]. Dai-ichi Shobō. (in Japanese)— "Sasano II"
Either became young male attendant (稚児, chigo) to Monk Kōrin (光林坊, Kōrinbō) aka Senshin (詮信)),[5] or was sent to Kōrin Cloister (光林房, Kōrinbō) in the care of his uncle Senshin.[6]
