This sen was introduced into Japan, where it began to be called monme (written as 匁, originally 文目 in Chinese characters which was an abbreviation for 目方 [mekata; weight] of 1 文銭 [1 monsen; 1 sen coin]).
それが日本に伝わり、日本では、一文銭の目方であることから「匁」（もんめ、元は文目）とも呼んだ。