Takenaga 【武永】4 The Japanese surnames etymology dictionary.
Toyama-ken , Hokkaidou , Ishikawa-ken . Originated from Ishikawa-ken Kahoku-gun Tsubata-machi . Place name with a record since the North / South morning era. Place names are also written as "Toiwata", "Tsubata Tada", "Tsunami field", "Tsunami multiple", "Tsugaku".