The number of suicides in 2015 fell 5.7 per cent from the previous year to 23,971 for the sixth consecutive year of decline, the National Police Agency said in a preliminary report Friday.
The annual total dropped below 25,000 for the first time in 18 years, the agency said, while 65 people on average killed themselves each day last year.
Nearly 70 per cent of the suicides in 2015 were men, it said.
From 1998 to 2011, more than 30,000 people committed suicides annually, with a peak of 34,427 in 2003. Japan's prolonged economic slumps were mainly deemed responsible for the increases.