Correspondingly, Windows-31J avoids duplicate encoding of the backslash by mapping the double byte 0x815F to U+FF3C FULLWIDTH REVERSE SOLIDUS, whereas standard Shift JIS maps it to U+005C. However, 0x5C in Windows-932 is nonetheless considered a Yen sign in certain contexts. For this reason, in many Japanese fonts, U+005C is displayed as a Yen symbol, which would normally be represented as U+00A5, rather than as a backslash per Unicode's suggested rendering. U+00A5 is one-way best-fit mapped onto 0x5C in Windows-932. However, code 0x5C in Windows-932 behaves as a reverse solidus (backslash) in all respects (e.g. in file paths on Windows systems) other than how it is displayed by some fonts, and Microsoft's documentation for Windows-932 displays 0x5C as a backslash.
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Microsoft adopted the ISO code in Windows-1252 for the Americas and Western Europe but 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.
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Windows-932 includes standard 7-bit ASCII mappings for single- byte sequences with the high bit set to 0. Hence, codes 0x5C and 0x7E are mapped to Unicode as U+005C REVERSE SOLIDUS (`\`, the backslash) and U+007E TILDE (`~`) respectively, as they are in ASCII (ISO-646-US). This is likewise done by the W3C/WHATWG encoding standard. By contrast, 0x5C is mapped to U+00A5 YEN SIGN (`¥`) in ISO-646-JP and consequently JIS X 0201, of which standard Shift JIS is an extension.
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Unicode 5.0 includes counting rod numerals in their own block in the Supplementary Multilingual Plane (SMP) from U+1D360 to U+1D37F. The code points for the horizontal digits 1–9 are U+1D360 to U+1D368 and those for the vertical digits 1–9 are U+1D369 to U+1D371. The former are called unit digits and the latter are called tens digits,Christopher Cullen et John H. Jenkins, Proposal to add Chinese counting rod numerals to Unicode and ISO/IEC 10646, 2004 which is opposite of the convention described above. Zero should be represented by U+3007 (〇, ideographic number zero) and the negative sign should be represented by U+20E5 (combining reverse solidus overlay).
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The most popular extension is Windows code page 932 (a CCSID also used for IBM's extension to Shift JIS), which is registered with the IANA as "Windows-31J", separately from Shift JIS. This was popularized by Microsoft, although Microsoft itself does not recognize the Windows-31J name and instead calls that variation "shift_jis". IBM's code page 943 includes the same double-byte codes as Microsoft's code page 932, while IBM's code page 932 includes fewer extensions (excluding those which Microsoft incorporates from NEC), and retains the character order from the 1978 edition of JIS X 0208, rather than implementing the character variant swaps from the 1983 standard. Windows-31J assigns 0x5C to U+005C REVERSE SOLIDUS (the backslash), and 0x7E to U+007E TILDE, following US-ASCII.
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JIS X 9010 (JIS C 6229) also defines character sets for the JIS X 9008:1981 (formerly JIS C 6257-1981) "hand-printed" OCR font. These include subsets of the JIS X 0201 Roman set (registered as ISO-IR-94 and omitting the at sign (@), lowercase letters, curly braces ({, }) and overline (‾)), and kana set (registered as ISO-IR-96 and omitting the East Asian style comma (､) and full stop (｡), the interpunct (･) and the small kana), in addition to a set (registered as ISO-IR-95) containing only the backslash, which is assigned to the same code point as in ISO-IR-93. The JIS C 6527 font stylises the slash and backslash characters with a doubled appearance. The character names given are "Solidus" and "Reverse Solidus", matching the Unicode character names for the ASCII slash and backslash.
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