Japanese phrase
万々歳ですね。 ban ban zai de su ne
Meaning
That could not have gone better.
When to use it
Calls a result exceptionally good. It conveys strong, warm approval when an important matter ends ideally.
Example dialogue
交渉がまとまりました。 kō shō ga ma to ma ri ma shi ta
The negotiations have been settled.
それなら万々歳ですね。 so re na ra ban ban zai de su ne
Then that could not have gone better.