A person paying, in Japan, severance pay or other such compensation as prescribed in Article 30, paragraph (1) (Retirement Income) (hereinafter referred to as "severance pay or other such compensation" in this Chapter) to a Resident must withhold income taxes from that severance pay or other such compensation at the time of payment and pay them over to the national government by the 10th day of the month following the month in which the day of withholding falls.
略称規定第百九十九条第一項・この章の中だけ
居住者に対し国内において第三十条第一項(退職所得)に規定する退職手当等(以下この章において「退職手当等」という。)の支払をする者は、その支払の際、その退職手当等について所得税を徴収し、その徴収の日の属する月の翌月十日までに…
わかりやすく言うと
退職手当や一時恩給など、退職によって一度に受け取る給与と、これと同じ性質の給与のことです(第三十条第一項)。