It is not the right way to read because, for example, it would be Yamadai or Yamedai if it was read all in the Wu reading, and it would be Yabatai in the Han reading.
例えば呉音ではヤマダイ又はヤメダイ、漢音ではヤバタイとなることから、必ずしも正確な読み方ではない。