I'm trying to develop an API to normalize Japanese numbers into arabic numbers. Since I'm not familiar with Japanese numbers, there are three questions for which I did not find an answer:
- How do we write negative numbers in kanji ? for example, what would be the syntax of -1234 ? Does one use the minus sign as in English, or some other sign like 負 ?
- For the decimal separator, I read many things, and the source do not have the same answer: some say that it can be as in English, so for example "三千2百２十.三" will be equal to "3220.3". Some other source say that the separator is "點" or "点" and hence "七十五點四〇二五" is equal to "75.4025". So should I support the three characters as decimal separator ?
- About the zero, which one is really used ? "零" or "〇" ?