Task: Sentence Expansion
Input (English): Higashi-Nagasaki Station is the railway station of the Seibu-Ikebukuro line in Toshima Ward , Tokyo , Japan .
Output (English): Higashi-Nagasaki Station ( 東長崎駅 , Higashi-Nagasaki-eki ) is a railway station on the Seibu Ikebukuro Line in Toshima , Tokyo , Japan , operated by the private railway operator Seibu Railway .