Around the first century, dotaku with 60 centimeters in height were started to be produced and, further getting bigger, they exceeded 1 meter in the second century and then finally reached 134 centimeters.
1世紀頃には高さが60センチに達し、さらに大型化が進み、2世紀には1メートルを超え、最終的には134センチに達する。