古伝 is read as こでん (koden) and means legend.
こでん
koden
こじきでん
Commentary on the Kojiki (by Motoori Norinaga, 1798)
こしでん
Commentary on Ancient History (by Hirata Atsutane, 1825)
こでんせつ
old tradition
こまい
old rice
こと
ancient city
こさん
seniority
こしき
old style
ころう
old person (knowledgeable about events of the distant past)
ふるほんいち
secondhand book fair
こだいまい
ancient rice varieties
こしょいち
こじき
Kojiki (earliest historical record of Japan, compiled in 712 CE)