There's 4 different types of alphabets in Japanese.
1. Kanji
Kanji are Chinese characters that the Japanese have adopted for their language. There are over 10,000 characters in this alphabet. There are two different types of pronunciation, the Chinese pronunciation(Onyomi/おんよみ) and the Japanese pronunciation.(Kunyomi/くよみ)
E.g. - 山 (mountain)
2. Hiragana
Hiragana is the basic Japanese phonetic alphabet. It contains 46 characters. This alphabet is used most often and is used for native Japanese words that don't have kanji.
E.g. - やま (mountain)
3. Katakana
Katakana is used for translating foreign words into Japanese, such as 'anime' into 'アニメ'. It also has 46 characters.
E.g. - ヤマ (mountain)
4. Rōmaji
This is Japanese words written in English, for example, 日本語(Japanese) would be written as Nihongo in Rōmaji. This alphabet is targeted towards non-Japanese speakers or beginners.
E.g. Yama (mountain)
