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Y?on are represented in hiragana using a kana ending in i, such as ? (ki), plus a smaller version of one of the three y kana, ya, yu or yo. For example, ky?, "today", is written [k?oo], using a small version of the yo kana, ?. Contrast this with kiy?, "skillful", which is written [k?ijoo], with a full-sized yo kana. In historical kana orthography, y?on were not distinguished with the smaller kana, and had to be determined by context.
In earlier Japanese, y?on could also be formed with the kana wa, wi, we, and wo; for example, / kwa, ??/?? kwi, ??/?? kwe, ??/?? kwo. Although obsolete in modern Japanese, kwa and kwi can still be found in several of the Ryukyuan languages today, while kwe is formed with the digraph . Instead of the kana ?, these are formed with the kana for ku, ?/?.
In Japanese Braille, Y?on is indicated with one of the y?on, y?on+dakuten, or y?on+handakuten prefixes.
Unlike in kana, Braille y?on is prefixed to the -a/-u/-o syllables, rather than the -i, e.g. (kyu) = y?on + ku: ??. Likewise, the -w- syllables are indicated by a prefix of the -a/-i/-e/-o syllables, rather than an -u syllable, e.g. / (kwa) = -w- + ka: ??.