Most Asian stock indices traded lower in a subdued trading session. Investors are awaiting the release of the Chinese consumer price index and producer price index and the Federal Reserve's last policy meeting on Wednesday.

The Bank of Japan Governor Haruhiko Kuroda said on Monday the BoJ will maintain its stimulus programme for as long as necessary to achieve its 2% inflation target. He added that "the BOJ will examine upside and downside risks to the economy and prices, and adjust monetary policy as needed".

Japan's leading economic index declined to 105.7 in May from 106.5 in April, missing expectations for a decrease to 106.0. April's figure was revised down from 106.6.

Japan's coincident index remained unchanged at 111.1 in May, beating expectations for a decline to 111.0.

Indexes on the close:

Nikkei 225 15,379.44 -57.69 -0.37%

Hang Seng 23,540.92 -5.44 -0.02%

Shanghai Composite 2,059.93 +0.55 +0.03%