Extended katakana
Japanese borrows many words. For sounds the basic kana don't have — f before vowels other than u, v, ti, di, she — katakana pairs a regular character with a small vowel.
F sounds
フ (fu) plus a small vowel.
| ファfa | フィfi | フェfe | フォfo | フュfyu |
Examples: ファミリー (famirī, “family”), フィルム (firumu, “film”), カフェ (kafe, “café”).
V sounds
ヴ is ウ with dakuten. Many words are more often written with the バ row, which is how Japanese pronounces them anyway: バイオリン is more common than ヴァイオリン (“violin”).
| ヴァva | ヴィvi | ヴvu | ヴェve | ヴォvo |
Examples: ヴァイオリン (vaiorin, “violin”), ヴェネツィア (Venetsia, “Venice”).
W sounds beyond ワ
| ウィwi | ウェwe | ウォwo |
Examples: ウィキペディア (wikipedia), ハロウィン (harowin, “Halloween”).
Ti, di, tu, du
テ デ ト ド plus a small vowel (or a small ュ), because the regular チ and ヂ are chi and ji.
| ティti | ディdi | デュdyu | トゥtu | ドゥdu |
Examples: パーティー (pātī, “party”), ディズニー (dizunī, “Disney”). Older loanwords often kept チ and ジ: チケット (chiketto, “ticket”), ラジオ (rajio, “radio”).
Che, she, je and the tsa row
| チェche | シェshe | ジェje |
| ツァtsa | ツィtsi | ツェtse | ツォtso |
Examples: チェック (chekku, “check”), シェフ (shefu, “chef”), ジェット (jetto, “jet”), モーツァルト (mōtsaruto, “Mozart”).
Why extended katakana matters
With only the basic katakana you'll stumble on brand names, menus and newer loanwords: パーティー, フォーク, ディズニー. Extended katakana is how Japanese writes the sounds it borrowed.
Frequently asked questions
Is ヴ still used?
Yes, mostly in names and foreign words, but many words are more often written with バ, ビ, ブ, ベ, ボ: バイオリン rather than ヴァイオリン.
Why is it パーティー and not パーチー?
Older loanwords adapted ti to チ (チケット, “ticket”). Newer ones keep the sound with ティ.