The Tang Dynasty valued Joshi KOKUSHI's contributions in repulsing the Toban army multiple times and his other achievements including the development of colonies, and they graced him with the title of Enkokuko (The Lord of the En region).
何度かの吐蕃軍の撃退などの功績および屯田開発などの成果に対して、唐は黒歯常之に燕国公の爵位を与えた。