It's no big secret that releasing a flood of new IP isn't exactly the highest priority for most Japan-centric game publishers right now. Even harder to imagine is the prospect of potential new franchises actually doing reasonably well from a sales perspective, while bringing something new to the table.
One need only look to the weekly Japanese sales charts provided by Media Create to see what does and doesn't sell. Unlike the U.S. market where a game can debut at 35,000 units sold and steadily sell at that rate for the next few months to eventually hit a million, the fate of new releases in Japan can often be deciphered by observing performance during the first two weeks. In other words, if it doesn't have a big opening, don't expect it to have long legs.
This is often the case with games in Japan that aren't part of some long-running series that the Japanese gaming community associates with the silver years of the country's game development scene.
Astounding then, that an up and coming publisher like Level-5 - far from the 320-pound* gorillas like Square Enix and Capcom - could not only introduce two new IPs in Japan in these past three years, but also successfully spin them off into other forms of media.