This item appears to be a 1942 Japanese 5 sen aluminum coin [5.2, 5.6].Design: The obverse features a stylized golden kite bird, symbolizing Japanese military prowess, with the date below [5.5]. The reverse shows a chrysanthemum imperial seal within clouds, with the value "5 Sen" indicated [5.5, 5.6].Composition: These coins were typically minted from aluminum during this era