Following the domains registered in April, 2017, several more Persona 5 related domains have been registered through Ryu’s Office , a marketing solutions business partner that has handled the registration of Atlus domains in the past.
The large majority of domains registered by Ryu’s Office are directly related to Atlus titles, and Ryu’s Office has assisted Atlus in marketing and promotion on a number of titles, most recently including promotion and planning for Persona 3: Dancing in Moonlight and Persona 5: Dancing in Starlight.
The registered domains are:
P5R.JP was previously registered and was recently updated, indicating that the site might soon become active.
Source: Persona Central