Thought of asking the question after reading this piece.
I have read this in quite a few feature articles, and a couple of books. But those are mostly written by Americans or other non-Japanese writers.
All Japanese parents that I have talked to, simply laugh at this idea.
Do any of you have supporting or contrary evidence to this?
My Indian friend has this to say: "If memorization is the same as being good at math, we are much better. New could tell 19x19 by memory, while in primary school. But I don't care. Japanese kids have a much more balanced education".
Could it be that they just learn a lot more things together with math, and that helps them to solve problems?