What's the most popluar FTA for Japanese exporter?

Japan currently implement total 11 FTAs, with Singapore, Malaysia, Mexico, Chile, Thai, Indonesia, Brunei, Asean, Philippines, Switzerland, and Vietnam.  What FTA is the most popular for Japanese exporter?


METI announced one interesting statistics to answer this question.  It is the number of Certificate of Origin ("CO") in Japan.  Please be noted this number shows the FTA utilization in export from Japan, so import into Japan is different.


In March 2011, total 10,305 COs for FTA were issued in Japan.  Among them, the top is for Thailand (4,785 issued), and the second is for Indonesia (2,504 issued).  The combination of Thailand and Indonesia consists of 71% of FTA COs.  Then, following countries are:


3rd:  Malaysia (788)
4th:  Chile (523)
5th:  Mexico (462)
6th:  Asean (429)


Although this is the result of the latest one month record, but representing comprehensive picture what FTAs are popularly used for Japanese exporters.


(Reference:  http://www.meti.go.jp/policy/trade_policy/epa/file/co_issuance.pdf )