The Tokyo session, also known as the Asian session, is a forex trading session that starts at 12:00 midnight GMT and ends at 9:00 AM GMT. It is the first major trading session to open and is considered to be the most active and liquid session in the forex market. The Tokyo session accounts for about 21% of total forex trading volume, with the majority of trading activity involving the Japanese yen. Other major currencies that are actively traded during the Tokyo session include the Australian dollar, New Zealand dollar, and the Hong Kong dollar.