After World War II, Japan was occupied by Allied forces led by the United States. During this time, Japanese manufacturers were required to mark their products "Made in Occupied Japan" to show that they were produced under the supervision of the occupying powers. These products were often of high quality, made with delicate craftsmanship and attention to detail. Today, items marked "Occupied Japan" are sought after by collectors who appreciate their historical significance and unique aesthetic. The scarcity of these items due to their limited production during a specific time period also adds to their value.