How many times have I ever reread this book throughout?
It's no less than at least 10 times or so, and each time I learned something new. For this reason, it strikes me as odd how Japanese students have never read the book contrary to my expectation, and so I suspect Japanese students nowadays are reduced to laypeople, or they depend on many a Japanese translation so much so that they have no command of foreign languages enough to read the originals.
The author of the book, the late Prof. Lars V. Ahlfors, though a Finn, is a great English writer, and I should like you to appreciate excellence of the original together with its mathematical content, of course.
In passing, did a popular edition go out of print?