We studied the influence that long working hours of husbands would have on family life in our survey of time use by employed husbands and wives in Tama New Town (1985). We analyzed time use grouping in six classes by the total hours of working hours and commuting hours in a weekday. The findings concerning husbands' time use were as follows : (1) The husbands' longest working hours reached 14 hr. (2) Their hours of sleep and time spent on social and cultural activities became shorter with the increase of working hours. (3) Their household work time consisted of only a few minutes. The findings concerning wives' time use were as follows : (1), The working hours of wives employed part-time became shorter as their husbands' working hours increased. (2) The working hours of wives employed full-time were shorter than their husbands'. (3) Wives bore close to 100% of the household work because of their husbands' long working hours. (4) Consequently the time spent on social and cultural activities by wives employed full-time decreased as their husbands' working hours increased.