OSAKA, Oct 20 (News On Japan) - At the ruins of Takeda Castle in Asago City, Hyogo Prefecture, a mystical sight, known as the "sea of clouds," appeared on Thursday.
The sea of clouds often occurs when there's a significant temperature difference between day and night. On Sep 19, the temperature difference near the Takeda Castle ruins was a significant 18.5°C, making it an ideal day to witness the 'castle in the sky.'