The yen sign ( ¥) or the yuan sign ( ￥) is a currency sign used by the Renminbi (CNY) and the Japanese yen (JPY) currency. This monetary symbol resembles a Latin letter Y with a single or double horizontal stroke.
The base unit of both currencies shared the same Chinese character/Kanji (; Japanese Shinjitai: 円) that means "circle". It is pronounced yuán in Standard Chinese and en in Japanese. In mainland China, the Chinese character is more frequently written in everyday situations using the simpler character 元, which has the same pronunciation as the formal financial character 圓 in Standard Chinese Basic accounting rules, People's Bank of China
第二十六条 凭证、账簿的各种代用符号为：人民币“元”符号为“￥” – Article 26 receipt, the symbol of Yuan is ￥. (but not in Japanese and in some Chinese varieties). The symbol is usually placed before the value it represents, for example RMB￥20 in China, and JP¥1500 in Japan. However it is also more commonly represented as 20元 in China and 1500円 in Japan.
Japanese-language locales of Microsoft operating systems use the code page 932 character encoding, which is a variant of Shift JIS. Hence, 0x5C is displayed as a yen sign in Japanese-locale fonts on Windows. It is nonetheless used wherever a backslash is used, such as the directory separator character (for example, in C:¥) and as the general escape character (¥n). It is mapped onto the Unicode U+005C REVERSE SOLIDUS (i.e. backslash), while Unicode U+00A5 YEN SIGN is given a one-way "best fit" mapping to 0x5C in code page 932, and 0x5C is displayed as a backslash in Microsoft's documentation for code page 932, essentially making it a backslash given the appearance of a yen sign by localized fonts.
Additionally, there is a Full-width character (￥) at code point for use with wide fonts, especially East Asian fonts.