In plain English
What Asian session means
Forex trading activity shifts across time zones during the business week. The Asian session generally refers to the period when Asia-Pacific institutions are most active. Its exact clock hours depend on the time-zone convention used. The label is often associated with trading conditions in yen, Australian dollar, New Zealand dollar, and Asian currency pairs, but all currencies can trade then.
Why it matters
Regional activity can influence when particular currency pairs have more available liquidity or respond to local economic and policy news. However, the Asian session does not imply low volatility or low risk. Central-bank decisions, intervention concerns, and unexpected global events can produce substantial movements during Asia-Pacific hours.
Example
A trader based in California sees USD/JPY move after a Bank of Japan announcement released during Tokyo business hours. Calling this the Asian session helps identify the regional context. It does not establish that Tokyo alone caused the move, because participants elsewhere can react simultaneously through electronic markets.
Quick answers
Common questions
Is the Asian session only for yen pairs?+
No. All major currency pairs can trade during Asia-Pacific hours. The label describes where a significant share of market participants are active, not a restriction on which currencies may be traded.
Why do Asian-session hours vary between websites?+
Sites may define the session around Tokyo alone or the wider Asia-Pacific region, and may use different time zones. Daylight-saving changes in locations such as Sydney and New York add further differences to displayed hours.
Sources