Watching television (TV) is a popular leisure activity for older people and its usage is almost constant in the rhythm of their daily life. A telemonitoring system of television-operating-state for older people living alone has been developed, and an older female living alone has been using this system for 10 years. On her working days, the average TV usage was 192 min per day in the first year, increasing year by year to 329 min per day 10 years later. TV usage temporarily increased when some TV programs took up a social topic of interest to her.