The mother of a man killed two years ago in a road-rage incident in Kanagawa Prefecture is calling for harsher penalties against offenders in the wake of a recent high-profile case.

"A tragic accident may be forgotten and a similar thing occurs again. I believe it is necessary to make laws stricter to prevent road rage," Fumiko Hagiyama, 79, said recently.

An Aug. 10 incident in which Fumio Miyazaki, 43, is suspected of reckless driving and assaulting another driver has revived memories of the June 5, 2017, road-rage attack that led to the deaths of Hagiyama's 45-year-old son Yoshihisa and his 39-year-old wife Yuka on the Tomei Expressway in Kanagawa Prefecture.