YOU SAID:

That's all just water under the bridge.

INTO JAPANESE

橋の下で水のすべてだけであります。

BACK INTO ENGLISH

Is all water under the bridge.

INTO JAPANESE

橋の下ですべての水です。

BACK INTO ENGLISH

All the water is under the bridge.

INTO JAPANESE

すべての水は橋の下です。

BACK INTO ENGLISH

All of the water is under the bridge.

INTO JAPANESE

すべての水は橋の下です。

BACK INTO ENGLISH

All of the water is under the bridge.