In Japanese, there are several ways to say "bye," depending on the context and level of formality:

Common Ways to Say "Bye" in Japanese

1. さようなら (Sayōnara)

• Meaning: Goodbye (formal, often used when parting for a long time)
• Usage: When you don’t expect to see the person for a while.

2. じゃね (Ja ne) / じゃあね (Jā ne)

• Meaning: See you / Bye (casual)
• Usage: Used among friends or peers when parting temporarily.

3. またね (Mata ne)

• Meaning: See you again / Bye (casual)
• Usage: Implies you will meet again soon.

4. バイバイ (Baibai)

• Meaning: Bye-bye (casual, borrowed from English)
• Usage: Informal, often used by young people or children.

5. お疲れ様でした (Otsukaresama deshita)

• Meaning: Thank you for your hard work / Goodbye (formal)
• Usage: Often used in workplace settings when leaving.

If you want, I can provide pronunciation tips or example sentences!