YOU SAID:
I am under the water.
INTO JAPANESE
私は水の下にいます。
BACK INTO ENGLISH
I'm under water
INTO JAPANESE
私は水の下にいる
BACK INTO ENGLISH
i'm under water
INTO JAPANESE
私は水の中にいる
BACK INTO ENGLISH
i am in the water
INTO JAPANESE
私は水の中にいる
BACK INTO ENGLISH
i am in the water
That's deep, man.