You're claiming there isn't any reliable sources because you've done no research. A simple check of the GameFAQs website (which lists pretty much every single commercial videogame) shows the majority of console RPGs are in fact of Japanese origin. In fact, GameFAQs has a specific subgenre of game called "Console-style RPG"; Every system has a "Games by Category: Role-Playing > Console-style RPG" subsection. Give it a rest guys; you're mistaken.