As for this, it is pointed out that Kiyomori tried to avoid interference from the forces of temples and shrines such as Enryaku-ji Temple, Enjo-ji Temple, Kofuku-ji Temple and so on, or he aimed to establish the maritime state or Saigoku (western part of Japan [esp. Kyushu, but ranging as far east as Kinki]) state by expanding the trade with the Sung (dynasty).
これについては、清盛は延暦寺・園城寺・興福寺など寺社勢力の干渉を避けるためとも、また、宋(王朝)との貿易拡大によって海洋国家、西国国家の樹立を目指していたとも指摘される。