Jam Island

Jam Island is one of 34 islands surrounding Whole Cake Island as part of the Big Mom Pirates' main territory known as Totland. It is presumably run by the "Minister of Jam" (ジャム大臣) like other islands on Totland. It is the second island of the Charlotte Family siblings' secret route to Whole Cake Island.

Past
At some point in the past, Jam Island became part of the Big Mom Pirates territory also known as "Totland".

Totland Arc
The Sanji retrieval team passed by Jam Island on their way to Whole Cake Island.

Trivia

 * Jam Island has buildings model after glass jars, commonly used to store food such as jam.