Wikipedia
is a traditional sweet often sold as a souvenir ( miyagegashi) on Okinawa, Japan. It is a small biscuit made of mostly lard and flour, with a mild and sweet flavor very similar to shortbread. Chinsuko was introduced to Okinawa some 400 years ago from China.
This traditional sweet of China is often seen in the Chinese metropolis It was made of wheat flour in the old days in southern China. It is a steamed confectionery such as sponge cake, which has steamed sugar and lard in addition to flour. It has been created in accordance with the Okinawa Prefecture of climate and materials. A baked confectionery of the Portuguese-a small, round cookie-that was transmitted through the Silk Road and the sea is also another theory. First, Chinsuko was the court confectionery that only royalty and the aristocracy of the Ryukyu Kingdom could eat; however, “Today, Chinsuko is most well-known as a popular souvenir, but it is still a traditional confectionery."