NTSC-J

[1] While NTSC-M is an official CCIR[2][3][4] and FCC[5][6][7] standard, NTSC-J or "System J" are a colloquial indicators.

The term NTSC-J is also incorrectly and informally used to distinguish regions in console video games, which use televisions (see Marketing definition below).

This small difference doesn't cause any incompatibility problems, but needs to be compensated by a slight change of the TV brightness setting in order to achieve proper images.

YIQ color encoding in NTSC-J uses slightly different equations and ranges from regular NTSC.

[15] The term NTSC-J was informally used to distinguish regions in console video games, which use televisions.

NTSC-J is used as the name of the video gaming region of Japan (hence the "J"), South East Asia (some countries only), Taiwan, Hong Kong, Macau, Philippines and South Korea (now NTSC-K) (formerly part of SE Asia with Hong Kong, Taiwan, Japan, etc.).

[16][17] Most games designated as part of this region will not run on hardware designated as part of the NTSC-U, PAL (or PAL-E, "E" stands for Europe) or NTSC-C (for China) mostly due to the regional differences of the PAL (SECAM was also used in the early 1990s) and NTSC standards.

[18][19][20][17] Many older video game systems do not allow games from different regions to be played (accomplished by various forms of regional lockout); however more modern consoles either leave protection to the discretion of publishers, such as Microsoft's Xbox 360, or discontinue its use entirely, like Sony's PlayStation 3 (with a few exceptions).