I (kana)

i
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transliteration	i
hiragana origin	以
katakana origin	伊
spelling kana	いろはのイ (Iroha no "i")

い in hiragana or イ in katakana (romanised as i) is one of the Japanese kana each of which represents one mora. い is based on the sōsho style of the kanji character 以, and イ is from the radical (left part) of the kanji character 伊. In the modern Japanese system of alphabetical order, it occupies the second position of the alphabet, between あ and う. Additionally, it is the first letter in Iroha, before ろ. Both represent the sound [i]. In the Ainu language, katakana イ is written as y in their Latin-based alphabet, and a small ィ after another katakana represents a diphthong.

Form	Rōmaji	Hiragana	Katakana
Normal a/i/u/e/o (あ行 a-gyō)	i	い	イ
	ii ī	いい いー	イイ イー

Other additional forms
Form (y-) Rōmaji Hiragana Katakana (ya) (や) (ヤ) (yi) (いぃ) (イィ) (yu) (ゆ) (ユ) ye いぇ イェ (yo) (よ) (ヨ)

Variant forms

Like other vowels, scaled-down versions of the kana (ぃ, ィ) are used to express sounds foreign to the Japanese language, such as フィ (fi). In some Okinawan writing systems, a small ぃ is also combined with the kana く (ku) and ふ　 to form the digraphs くぃ kwi and ふぃ hwi respectively, although the Ryukyu University system uses the kana ゐ/ヰ instead.

Origin

い comes from the left part of the Kanji 以, while イ originates from the left part of the Kanji 伊.

Stroke order

File:Hiragana い stroke order animation.gif Stroke order in writing い

File:Katakana イ stroke order animation.gif Stroke order in writing イ

Stroke order in writing い

The Hiragana い is made in two strokes:

1. At the top left, a curved vertical stroke, ending with a hook at the bottom.
2. At the top right, a shorter stroke, slightly curving in the opposite direction.

Stroke order in writing イ

The Katakana イ is made in two strokes:

1. At the top, a curved diagonal line going from right to left.
2. In the center of the last stroke, a vertical line going down.

Other communicative representations

• Computer encodings

Character	い		イ		ｲ
Unicode name	HIRAGANA LETTER I		KATAKANA LETTER I		HALFWIDTH KATAKANA LETTER I
Encodings	decimal	hex	decimal	hex	decimal	hex
Unicode	12356	U+3044	12452	U+30A4	65394	U+FF72
UTF-8	227 129 132	E3 81 84	227 130 164	E3 82 A4	239 189 178	EF BD B2
Numeric character reference	い	い	イ	イ	ｲ	ｲ
Shift JIS	130 162	82 A2	131 67	83 43	178	B2

Character	ぃ		ィ		ｨ
Unicode name	HIRAGANA LETTER SMALL I		KATAKANA LETTER SMALL I		HALFWIDTH KATAKANA LETTER SMALL I
Encodings	decimal	hex	decimal	hex	decimal	hex
Unicode	12355	U+3043	12451	U+30A3	65384	U+FF68
UTF-8	227 129 131	E3 81 83	227 130 163	E3 82 A3	239 189 168	EF BD A8
Numeric character reference	ぃ	ぃ	ィ	ィ	ｨ	ｨ
Shift JIS	130 161	82 A1	131 66	83 42	168	A8

• Braille

い / イ in Japanese Braille
い / イ i	いい / イー ī

• Japanese semaphore

The Morse code for い or イ, is ・－.

In Japanese phonetic alphabet, one would say "いろはのイ" (Iroha no I.)