It is recorded that between 728 and 811 the Kenbokkaishi was dispatched 14 times (one time dispatched as a Japanese envoy to Tang Dynasty China via Bokkai, and one that was a dispatch of navigators).
728年から811年までの間に14回（うち1回は渤海経由の遣唐使。このほか操舵手等の派遣が1回。）の使節が記録に残っている。