Season 1

Season 1 of Special Investigation Nine premiered on April 11, 2018

Season 2

Season 2 of Special Investigation Nine premiered on April 10, 2019

Season 3

Season 3 of Special Investigation Nine premiered on April 8, 2020

Season 4

Season 4 of Special Investigation Nine premiered on April 7, 2021

New enemies appear to block the Tokusou 9. As in the past, the Tokusou 9 hold on to their belief that "the case will be solved at all costs" and put t...Read more

Season 5

Season 5 of Special Investigation Nine premiered on April 6, 2022

Season 6

Season 6 of Special Investigation Nine premiered on April 5, 2023

Season 7

Season 7 of Special Investigation Nine premiered on April 3, 2024

Season 8

Season 8 of Special Investigation Nine premiered on April 9, 2025