|  Also mikawa 御溝. Ditches surrounding each 
building in the Imperial Palace. The present palace, Kyoto Gosho 京都御所, has ditches 
laid with stones cut in geometric shapes. However, it is thought that these ditches 
were more like small man-made streams in the Heian period. The stream flowing 
north to south past the steps of the Seiryouden 清涼殿 was often 
the subject of poetry in the Heian period.  |