<p>Tough one. The extracurricular experience in Japan would look great, but most students who get into competitive colleges will have gone well beyond Pre-calculus by the time they graduate. Most students get at least AP Calculus AB under their belt, while a good number of students take both BC and go on to take college level courses like linear algebra and multivariate calculus as seniors. I say go with the math, then again I may be biased, as I am a mathematics major. Still though, I think going higher in math will be the more beneficial option.</p>