Sony Computer Entertainment released a firmware update (v2.43) for the PS3, specific to the Japan.

PS3 users in all other regions will not be prompted to download v2.43. However, if you manually initiate a firmware update by clicking on "System Update" under the XMB?s Settings icon, the v2.43 update will be available, regardless of where you are located.

Users outside of Japan do not need to perform this update if their PS3 system software is on version v2.41 or later.