Useful Japanese Phrases/Sentences: When you thank or apologize to someone

• Thank you.
• Arigatou gozaimasu.

• Thank you very much.
• Doumo arigatou gozaimasu.

• Thank you (past)
• Arigatou gozaimashita.

• Thanks
• Doumo.

• You're welcome.
• Douitashimashite.

• Don't mention it.
• Iie. (Literally means "No.") also can be used with the rising accent if it's not a big deal.

• Excuse me.
• Sumimasen (used when you talk to someone, and to apologize for small faults - "Sorry")

• Yes.
• Hai. (can be used to answer someone's call.)

• I'm sorry.
• Doumo sumimasen.

• Don't be sorry.
• Iie. / Doumo sumimasen (is also used. more polite)