How to give your best apology ?

Groupon CEO Apologizes For Poorly Executed Offer In Japan

remark from HackerNews

perfect for execution of an apology (both by Japanese standards and for companies generally).

• Heartfelt apology

• Total acceptance of responsibility

• Comes straight from the top

• Makes full amends to customers

• Identifies specific changes made to address problem in the future

• Closes with thanks to customers