Public broadcaster NHK showed the final few moments of the siege as heavily-armed officers stormed the apartment complex.
After Monday's shooting, police approached Mizobata, who was armed with two pistols. He opened fire at the police, blasting out the windows of a squad car before fleeing.
Eventually, police tracked Mizobata down to an apartment where he was surrounded for 17-hours before turning the gun on himself. A massive manhunt began on Monday after Mizobata allegedly killed 45-year-old Junsuke Ishiyama and wounded three others when he opened fire during a meeting at the offices of a construction company. Mizobata is reportedly the son of the company owner.