Due to the nature of the postal address-reading and sorting machine, numbers in the address are more correctly read in the case of Arabic numerals than Chinese characters, which causes less frequent delays due to misreading.
区分機の読み取りの特性上、住所の番地などは漢数字よりも英数字のほうが読み間違いが少なく区分機の誤区分による遅延が起きにくい。