His statement followed a meeting between Diet (parliament) affairs chief of the ruling Liberal Democratic Party, Hiroshi Moriyama, and Jun Azumi of the opposition Constitutional Democratic Party.
A research group at the Ministry of Internal Affairs and Communication is also discussing ways of identifying online bullies.
Possible changes include requiring social network service operators to disclose the identities and phone numbers of abusers, if called on to do so.
In a joint statement, a group of social network companies, including the Japanese branches of Facebook, Twitter and Line, said they would ban abusers
The day of her death, Kimura posted a message on Instagram