Katakana Phonetic Extensions.
It is divided into two versions: Katakana and hiragana.
Usually, hiragana is the default syllabary, and Katakana is used in certain special cases.
Hiragana and Katakana characters were incorporated as a relatively accurate
way to represent the sounds of Chinese characters.
After downloading the Hiragana and Katakana lists and printing them on paper,
you can practice writing by tracing over the letters.
Katakana are mostly used for representing onomatopoeia,
non-Japanese loanwords(except those borrowed from ancient Chinese), the names of plants and animals(with exceptions), and for emphasis on certain words.
When it is necessary to distinguish between native Japanese kun'yomi and Chinese-derived on'yomi pronunciations, for example in kanji dictionaries,
the Japanese pronunciations are written in hiragana, and the Chinese pronunciations are written in Katakana.
The one general exception to this is modern Chinese place names, personal names, and(occasionally)
food names-these will often be written with kanji, and Katakana used for the furigana;
in more casual writing these are simply written in Katakana, as borrowed words.