①When working hours extended under the provisions of Article 33 or paragraph (1) of Article 36 of the Act fall between 10 p.m. and 5 a.m. (or the period between 11 p.m. and 6 a.m. in case when the Minister of Health, Labour and Welfare recognize the necessary of the application of those hours at a certain areas or time of year ), the employer shall pay premium wages for the work during such hours at a rate no lower than 50 percent (or 75 percent or more for work extended beyond 60 hours in the month) over the amount calculated by multiplying the amount stipulated in items of paragraph (1) of Article 19 by the number of working hours.

②When working hours on days off under the provisions of Article 33 or paragraph (1) of Article 36 of the Act fall between 10 p.m. and 5 a.m. on a rest day (or the period between 11 p.m. and 6 a.m. in case when the Minister of Health, Labour and Welfare recognize the necessaryof the application of those hours at a certain areas or time of year), the employer shall pay premium wages for work during such hours at a rate no lower than 60 percent over the amount calculated by multiplying the amount stipulated in items of paragraph (1) of the preceding Article by the number of working hours.