On Sep 6 secretary generals of Japan Restoration Party and Unity Party decided that Toru Hashimoto and Kenji Eda, the leaders of the two parties are to become co-presidents after the parties merge.
Parties aim to hold a merge meeting on the new party creation on Sep 21. The details of the manifesto and party management system as still to be worked out.
On Sep 6 parties agreed about the co-president system and UP accepted that the word ‘restoration’ will remain in the name of the new party. Ideas about the new party name will be collected from the members of both parties before the final decision is made. It was also decided that the party headquarters will be located in Osaka.
On Sep 7 Hashimoto and Eda plan to have a meeting to reconfirm the details.
Source
http://www3.nhk.or.jp/news/html/20140907/k10014408591000.html