However, it was a widely-accepted theory that the Kashiwade clan (Takahashi clan) was assigned the zenshoku position in the Tomonomiyatsuko clan during the sixth century and had close connection with the east provinces.
しかし、膳氏（高橋氏）が6世紀には膳職の伴造の地位につき、東国とのゆかりが深いとする説が有力である。