The required steps for an application are:
Make an account on the Participant Portal (http://ec.europa.eu/research/participants/portal/desktop/en/home.html)
Register your organisation. Your organisation needs to be registered and have a 9-digit Participant Identification Code (PIC) that is the unique identifier of your organisation and will be used as a reference by the Commission in any interactions.
Draft your proposal together with all the partners involved, and submit your Electronic Proposal (to be done by the coordinator).
The JEUPISTE project created a manual for “How to obtain PIC code and submit proposal” in Japanese language. Please refer to: http://www.jeupiste.eu/news/pic-manual-jp_en