Formal:
* どうもありがとうございます (Dōmo arigatō gozaimasu): This is the most common and polite way to say thank you. It's suitable for formal situations and when addressing someone you respect. It conveys sincere gratitude. No negative connotations.
* ありがとうございました (Arigatō gozaimashita): This is the past tense of "arigatō gozaimasu." Use it when thanking someone for something that has already happened. No negative connotations.
* お礼を申し上げます (Orei o mōshiagemasu): This is a very formal and polite way to say thank you. It's often used in written correspondence or when expressing deep gratitude. No negative connotations.
Informal:
* ありがとう (Arigatō): This is a casual and friendly way to say thank you. It's suitable for friends, family, and people you know well. No negative connotations.
* ありがとうね (Arigatō ne): This is a slightly more informal way to say thank you. It's used among close friends and family. No negative connotations.
* どうも (Dōmo): This is a very casual and abbreviated way to say thank you. It's often used in everyday conversation and is suitable for people you know well. No negative connotations.
Potential Negative Connotations:
* 感謝します (Kansha shimasu): While it technically translates to "thank you," it can sound overly formal or even stiff in everyday conversation. It's best reserved for formal occasions or situations where you want to express profound gratitude.
* お蔭様で (Okagesama de): This phrase means "thanks to you" and is used to express gratitude for something positive that has happened to you, often due to someone else's help. However, it can sometimes sound overly humble or even self-deprecating.
Important Considerations:
* Context is key: The appropriate way to say "thank you" depends on the situation, your relationship with the person, and the level of formality.
* Tone of voice and body language: Your tone of voice and body language can also convey gratitude. Make eye contact, smile, and use a sincere tone.
By choosing the right expression and using appropriate tone and body language, you can express your gratitude effectively and respectfully in Japanese.