174화: 이상한 선박의 출현으로 아톰이 일본 해저의 잠수함 운하 가능성을 조사하게 됩니다.

174

Strange incidents start occurring, such as an event where a vessel that had disappeared in the Japan Sea turns up in the Pacific Ocean. Dr. Ochanomizu thinks that there could be a submarine canal right beneath Japan. So Atom goes in search of the canal, and encounters subterranean people on the ocean floor. (Source: Tezuka Productions)