From FTSE EPRA/NAREIT Asia ex Japan REITs Index Factsheet (31 Jan 2017):
(caveat: this is based on my understanding of the factsheet, I may be wrong)
Top 10 Constituents
Ascendas Real Estate Investment Trust (SG) - 10.28%
CapitaLand Mall Trust (SG) - 9.88%
Link Real Estate Investment Trust (HK) 9.68%
Suntec REIT (SG) - 9.62%
CapitaLand Commercial Trust (SG) - 7.03%
Mapletree Commercial Trust (SG) - 6.67%
Fortune Real Estate Investment Trust (HK) - 5.00%
Mapletree Industrial Trust (SG) - 4.77%
Keppel REIT (SG) - 4.43%
Mapletree Greater China Commercial Trust (CH) - 4.15%
Property Sector Breakdown
Diversified (7) US$9,837m 31.90%
Healthcare (1) US$461m 1.49%
Industrial (3) US$5,743m 18.62%
Lodging/Resorts (1) US$641m 2.08%
Office (3) US$3,796m 12.31%
Residential (1) US$664m 2.15%
Retail (7) US$9,697m 31.44%
Constituents - 23
Mkt Cap - US$30,839m
Div Yield - 5.72%
No geog breakdown given. From the Top 10 above, it's at least 52.68% S-Reits.