I finally got a chance to visit the Changi Chapel and Museum recently. If you haven't been, I recommend it (admission is free). The museum gives insight to the lives of people in Singapore during the Japanese Occupation from February of 1942 to September of 1945. For those three and a half years, people interned by the Japanese lived terrible and fearful lives.
People lived in camps and men and women were kept separate. Food was rationed because of its scarcity. Families received ration cards, but often the food given was insufficient and of poor quality. As a result, malnutrition was widespread. People learned to make-do with what they had. Similar to the Victory Gardens of World War II in the United States, people in Singapore at the time grew whatever they could to feed themselves. Tapioca and sweet potatoes became dietary staples, often being served for every meal. Those living in Singapore at the time lived in total fear of the Japanese military. On the walls of the museum, you can see photos of emaciated men who were used by the Japanese for labor. People had to bow whenever Japanese soldiers would pass them by; those who didn't would be beaten or taken away, often never to be seen again. Thousands of people living in Singapore of all ethnicities were killed by the Japanese during this time. The stories told in the museum are shocking and painful to learn about, but they are an important part of Singapore's past. Changi Museum's website has a database of internees which is accessible to the public. If you want to learn more about the Japanese Occupation of Singapore, check this link out.