Ep. 137: Even in the Stomach, in the Acid
Ipinalabas noong Setyembre 7, 1979
137
Shizuka is eating peanuts and accidentally swallows her mom's 500,000 yen opal. Nobita and Doraemon use the Suichu Buggy and the Small Light to get into Shizuka's stomach and get the opal out. (Source: Wikipedia)