よ, in hiragana or ヨ in katakana, is one of the Japanese kana, each of which represents one mora.

When small and preceded by an -i kana, this kana represents a palatalization of the preceding consonant sound with the [o] vowel (see yōon).

[1] In mathematics, よ is sometimes used to represent the Yoneda embedding.

* The yōon characters ょ and ョ are encoded in Japanese Braille by prefixing "-o" kana (e.g. Ko, So) with a yōon braille indicator, which can be combined with the "Dakuten" or "Handakuten" braille indicators for the appropriate consonant sounds.

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