In Japan, do children ever skip school years?

Question:

In anime, there are often children who take entrance exams for high school at a very young age. Obviously in real life it shouldn't happen nearly as often as in anime, but is it actually possible to get into high school at a younger age than usual with high academic ability?

Answer:

No. No matter if they are able to do higher end work they all stay in the same grade level as everyone else their age.

3 kids in school in Japan

When Rina, who's currently 6 years old, ranked in the US school of a reader to the 6th grade, she could have skipped the grade she was put in. She was only in the states for an 8 month period while her father studied kidney disease research at the hospital so she stayed in that grade. In Japan she will always stay with her age range.