YOU SAID:

The cat had several mice in his pocket.

INTO JAPANESE

猫は、彼のポケットにいくつかのマウスをしていた。

BACK INTO ENGLISH

The cat had some mouse in his pocket.

INTO JAPANESE

猫は自分のポケットにマウスを持っていた。

BACK INTO ENGLISH

The cat had a mouse in his pocket.

INTO JAPANESE

猫は自分のポケットにマウスを持っていた。

BACK INTO ENGLISH

The cat had a mouse in his pocket.