There's a reason Shotoku was able to rule Japan, and it ain't because a watery tart threw a sword at 'im.
Let's be honest for a second, a sword, even a magical one, cannot be used as a base for a stable governement. Even Bishamonten has a pagoda, beside having a spear. A kingdom built on a sword can only be oppressive, as it is relying on a weapon to exist.
HarmonyHarmony is to be valued, and the avoidance of wanton opposition to be honoured.
Extract from the first article in the Seventeen-Article Constitution