posted an interview with Capcom of Japan’s COO, Haruhiro Tsujimoto, where he discussed the release strategy for Rockman Online, the upcoming online RPG from Capcom and NeoWiz. In a nutshell, Tsujimoto revealed the game would remain exclusive to South Korea, passing up a Japanese (and Western) release in order to focus on branching the game's appeal to Asian markets. However, despite this statement, it would appear that Capcom is indeed looking at releasing Rockman Online in Japan, too.
According to My Game News Flash and NeoGaf, Capcom Japan recently registered the Rockman Online title at the Japanese Patent & Trademark Offices -- a surefire sign the game is making the jump to the Blue Bomber's native country. Taking into consideration the game wasn't initially set to release in Japan, I'd say this is a good chance we'll be seeing the game registered abroad, further fueling the chances of RMO hitting other regions.
A Western release is still up in the air, mind you. Capcom of America showed some interest in the title last month, when they asked fans via Capcom Unity, if this is something they'd like to see released stateside. The news was met with mostly positive reception; but there's been no indication if it'll sway the possibilities. Until we hear otherwise, keep rallying support.