It's actually what they did. I heard from people involved in the CJK-unification project that the Japanese representatives insisted this be done as a condition for their participation.
Given that there were thousands of such characters, some characters slipped through and the same code point was used by both Chinese and Japanese.
The Japanese have been bickering about the handful of those cases ever since.
Given that there were thousands of such characters, some characters slipped through and the same code point was used by both Chinese and Japanese.
The Japanese have been bickering about the handful of those cases ever since.