Media reports say Japan's education bureaucrats are considering allowing students with "stellar" academic records to graduate from high school before they turn 18. In other words, the required three-year stint at high school might be cut to two.

In most countries, allowing university entry before age 18 would be seen as something quite normal, or even as desirable for bright math or science students. But not in Japan, at least to date.

Allowing bright students to enter university before age 18 has long been seen as rather dangerous. What would happen to group harmony in the high schools where everyone is supposed to move up together? And how about the individual concerned being seen as the nail that sticks out and facing severe discrimination?