Application of Alphabets
Kanji, hiragana, and katakana are often used together in Japanese sentences and even in words. Almost every sentence in Japanese includes kanji and hiragana. Here's a example of how all three alphabets are used in a sentence:
私の名前はジョンです。
Watashi no namae wa Jon desu.
My name is John.
Watashi no namae wa Jon desu.
My name is John.
As previously stated in Intro to Hiragana, hiragana and kanji can be used together to form a word. Kanji and katakana can also be used together to form words, such as in 北アメリカ (kita:amerika), which means North America.