Bodies of man and woman in their 80s found dead by police in one house . Two men in 60s and 80s and women in 60s found with fatal injuries nearby . Suspect has reportedly confessed to killings after being arrested by police . He has been described in Japan as a ' hikikomori ' - literally ' the withdrawn ' His Twitter account had the names of the victims and a map of scene . Other messages on the account appear to be about telepathy and stalking .
Bodies of man and woman in their 80s found dead by police in one house . Two women in 60s and 80s and man in 60s found with fatal injuries nearby . Suspect has reportedly confessed to killings after being arrested by police . He has been described in Japan as a 'hikikomori ' - literally 'the withdrawn ' His Twitter account had the address of the homicides and a map of scene . Other tweets on the account appeared to be about telepathy and stalking .