Japan's tertiary activity index increased for the second straight month in May, though marginally, according to rttnews.

The tertiary activity index edged up 0.1 percent month-over-month in May, following a 1.0 percent rise in April. In contrast, economists had expected a 0.3 percent decrease for the month.

Among the individual components of the survey, activity was up for wholesale trade, medical, health care and welfare, information and communications, transport and postal activities, finance and insurance and business-related services.