Katakana Characters

 

The 46 Basic Characters

vowels	ア a	イ i	ウ u	エ e	オ o
k-line	カ ka	キ ki	ク ku	ケ ke	コ ko
s-line	サ sa	シ shi	ス su	セ se	ソ so
t-line	タ ta	チ chi	ツ tsu	テ te	ト to
n-line	ナ na	ニ ni	ヌ nu	ネ ne	ノ no
h-line	ハ ha	ヒ hi	フ fu	ヘ he	ホ ho
m-line	マ ma	ミ mi	ム mu	メ me	モ mo
y-line	ヤ ya		ユ yu		ヨ yo
r-line	ラ ra	リ ri	ル ru	レ re	ロ ro
w-line	ワ wa				ヲ wo
	ン n

濁音 (dakuon) and 半濁音 (handakuon)

Similarly, the additional katakana chart below shows those with 濁音 (dakuon) and 半濁音 (handakuon).

g-line	ガ ga	ギ gi	グ gu	ゲ ge	ゴ go
z-line	ザ za	ジ ji	ズ zu	ゼ ze	ゾ zo
d-line	ダ da	ヂ ji	ヅ zu	デ de	ド do
b-line	バ ba	ビ bi	ブ bu	ベ be	ボ bo
p-line	パ pa	ピ pi	プ pu	ペ pe	ポ po

拗音 (youon)

Adding smaller version of ya, yu or yo (ャ, ュ, or ョ) to katakana ending in vowel i form the additional katakana chart below.

k-line	キャ kya	キュ kyu	キョ kyo
s-line	シャ sha	シュ shu	ショ sho
t-line	チャ cha	チュ chu	チョ cho
n-line	ニャ nya	ニュ nyu	ニョ nyo
h-line	ヒャ hya	ヒュ hyu	ヒョ hyo
m-line	ミャ mya	ミュ myu	ミョ myo
r-line	リャ rya	リュ ryu	リョ ryo

Below shows the additional katakana chart of 拗音 (youon) with 濁点 (dakuten) and 半濁点 (handakuten).

g-line	ギャ gya	ギュ gyu	ギョ gyo
z-line	ジャ ja	ジュ ju	ジョ jo
b-line	ビャ bya	ビュ byu	ビョ byo
p-line	ピャ pya	ピュ pyu	ピョ pyo

促音 (sokuon)

Similar to hiragana, when a small tsu (ッ) called 促音 (sokuon) is added, it means the following consonant is geminated or doubled. In romaji, this is represented by doubling the consonant that follows the small tsu.

For example, pet is represented in katakana as ペット (petto). The pronunciation is the same as in hiragana, after the first consonant is pronounced, pause for the amount time to pronounce the consonant, then continue to pronounce the following consonant.


Long Vowels 長音 (chouon)

For long vowels, instead of adding a second vowel as in hiragana, katakana usually uses a short line (ー) to represent the second vowel. See some examples below..

	Katakana	Romaji	Meaning
1.	セーター	se- ta-	sweater
2.	メニュー	me nyu-	menu
3.	シャワー	sha wa-	shower
4.	ロビー	ro bi-	lobby
5.	タクシー	ta ku shi-	taxi
6.	マレーシア	ma re- shi a	Malaysia
7.	カレー	ka re-	curry

Note that long vowels in romaji is represented by a horizontal bar on top of the first vowel, just like "ō" in rōmaji. However, it is usually omitted nowadays.

For example, the correct way for Japan capital in romaji is Tōkyō, but we always write it as Tokyo. The city Kyōto is also written as Kyoto. I will not add the horizontal bar on top of the first vowel unless necessary.

Resource : https://www.learn-japanese-adventure.com/katakana-chart.html