The main currency in the Carry Trade is Yen, because at that time the interest rate of Yen was very low. And many operations of Carry Trade were marked by AUD and NZD.

Then the currency engaged in carry trade most was Yen for its interest rate was very low. And many carry trade's targets were Australia dollar and New Zealand dollar.

The currency used for the carry trade at that time was mainly the Yen because of its low interest rate, and the objects for many carry trades were AUD and NZD.