In Sun Moon Lake, everyone is likely familiar with a Japanese figure known as the Father of Taiwanese Black Tea,who is MR.Kokichiro Arai. In the past, he staunchly defended tea production machinery made of metal, preventing it from being requisitioned for the weapons of World War II. This dedication is credited with preserving the Sun Moon Lake black tea we know today. MR.Kokichiro never left Taiwan until his passing. On his daughter’s tomb, we discovered the mark of the Paulownia flower, which is the family crest of Toyotomi Hideyoshi, the dominant figure in unifying Japan. From a wandering swordsman to unifying Japan and establishing Osaka Prefecture, Hideyoshi’s construction of moats around the area was aimed at ensuring societal stability.