Special Investigation Team

Special Investigation Team (特殊事件捜査係, Tokushu Jiken Sousa Kakari) are specialized detective units of the Prefectural police headquarters (PPH) of Japan, mandated for critical incidents including crime investigation and even SWAT operations.

All unit are established in the First Investigation Divisions (捜査一課, Sousa Ikka) of each Prefectural police headquarters (PPHs). These units are generally local-based, so organizations (including their unit names) and equipment are varied.

In the First Criminal Investigation Division of the TMPD, the following units are assigned for special criminal investigation activities:
 * First Deputy Manager of Special Investigation:
 * Special Investigation Unit One
 * Special Investigation Unit Two
 * Second Deputy Manager of Special Investigation:
 * Special Investigation Unit Three
 * Special Investigation Unit Four
 * Special Investigation Unit Five
 * Third Deputy Manager of Special Investigation:
 * Special Investigation Unit Six
 * Special Investigation Unit Seven

Foundation of Team Alpha
Following the resignation of Lt.Col. Aramaki Daisuke of then-Section 9, results in it also got dissolved; Major Motoko Kusanagi founded Team Alpha, a Special Investigation Dispatch Task Force (特殊班派遣部隊, Tokushuhan-haken-butai) consists of former leader of Unit 1, Ayato Tokouryo, Sergeant Uchino Hakazaki of Unit 4, and Hinata Tokouryo. Kyu Himawari of Unit 7 and 2 more undisclosed members are also in the team, but was then discharged due to classified reasons.

Following the terrorists attack during their training in Washington D.C., the team were temporarily lay low until 6 months later, when The Japanese Government received intel from the FBI warning them Han-Song Kyuk has arrived in Japan; thus reactivated the team, and recruited 3 more personels; Anna Novackova and "Marcy" of Ukrainian-Belarus' Rebel Force The Girl Scouts, and Madison Taylor of The Royal Valkyrja and SAS 22nd Regiment. The last member, Yamada Kyoko, was officially signed and conformed the final roster.