It's no exaggeration to say that you may as well give up studying math once and for all if you fails to read this book; the book is excellent to that much extent, and so much so that the one is of great authority and dominance to the calculus education practiced in the U.S. For those suspicious of it, I'd like to refer you to the following article by Steven G. Krantz: http://www.msri.org/ext/krantz.pdf
Note in passing that I'm not sure whether there is a Japanese translation of the book or not, but you must read the book in the original if you want to study the subject more seriously.