A developer holding apparatus for holding a developer material therein, comprising: a chamber for holding the developer material; a bearing ; and a rotatable member disposed within the chamber, the rotatable member including: a rotational shaft rotatably received by the bearing, an agitating portion that is offset from the rotational shaft and extends in a first direction parallel to the rotational shaft, and an arm portion connecting the agitating portion to the rotational shaft ; characterized in that the agitating portion includes a first portion in a shape of a flat plate and a second portion that has one longitudinal end connected to the arm portion , the first portion being a substantially middle portion of the agitating portion and having a first width (W1) in a second direction substantially perpendicular to the first direction, and the second portion having a second width (D1) in a third direction substantially parallel to the second direction, the second width being smaller than first width; and further characterized in that a major surface of the flat plate of the first portion lands on a surface of a pile of the developer material when the agitating portion rotates about the rotational shaft . a chamber for holding the developer material; a bearing ; and a rotatable member disposed within the chamber, the rotatable member including: a rotational shaft rotatably received by the bearing, an agitating portion that is offset from the rotational shaft and extends in a first direction parallel to the rotational shaft, and an arm portion connecting the agitating portion to the rotational shaft ; characterized in that the agitating portion includes a first portion in a shape of a flat plate and a second portion that has one longitudinal end connected to the arm portion , the first portion being a substantially middle portion of the agitating portion and having a first width (W1) in a second direction substantially perpendicular to the first direction, and the second portion having a second width (D1) in a third direction substantially parallel to the second direction, the second width being smaller than first width; and further characterized in that a major surface of the flat plate of the first portion lands on a surface of a pile of the developer material when the agitating portion rotates about the rotational shaft . a rotational shaft rotatably received by the bearing, an agitating portion that is offset from the rotational shaft and extends in a first direction parallel to the rotational shaft, and an arm portion connecting the agitating portion to the rotational shaft ; characterized in that the agitating portion includes a first portion in a shape of a flat plate and a second portion that has one longitudinal end connected to the arm portion , the first portion being a substantially middle portion of the agitating portion and having a first width (W1) in a second direction substantially perpendicular to the first direction, and the second portion having a second width (D1) in a third direction substantially parallel to the second direction, the second width being smaller than first width; and further characterized in that a major surface of the flat plate of the first portion lands on a surface of a pile of the developer material when the agitating portion rotates about the rotational shaft . <EOS>