The avoirdupois pound ( 0.45359237 kilogram ) is used in :
United States of America (USA) , South Africa, United Kingdom (UK), Republic of Ireland (ROI) and many former British colonies. gms g sind klos killograms grms gramms grames kilpounds
The Japanese 1 yen coin has a mass of one gram. (lighter than the British penny (3.56 g), the United States cent (2.5 g) or the "Euro-cent" (2.30 g)).
Wikipedia links covering units of mass show/hide