After leaving the Earth once Pandon was properly killed, Seven returned and crashed to the planet when he was attacked by a pair of Alien Pitts, wherein his comatose body is put under protection by TDF and the new generation of Ultra Guard led by Furuhashi.
[1][2] While Moritsugu also returns to provide the grunts for Ultraseven, Katsuyuki Yamazaki takes over the role in Evolution pentalogy to emphasize Kazamori's merger with the Ultra.
30 years after Seven left the Earth and eventually returned in an injured state, Furuhashi had since been promoted into the rank of captain of the new Ultra Guard, leading the new members; Tōgō, Risa and Kaji into handling alien invasions.
Years later in the 30th Anniversary Trilogy, Furuhashi was promoted to a staff officer of TDF's Far East Base branch and observed the progress of the new Ultra Guard under Shiragane's leadership.
Although his death was avenged by Seven not long after, Furuhashi was revived by the will of the universe to become a spectator of Earth's past and the ancient humans being invaders who overthrew the Nonmalt as the dominant race of their planet.
This culminated in Dan/Seven outright impersonating Kazamori for an entire year in The Final Chapters hexalogy ever since the Alien Valkyrie try to sow discord amongst TDF and Ultra Guard.
In Evolution, Kazamori's time in recuperation provided him with psychokinetic abilities and mental link to the imprisoned Ultraseven, due to the Ultra's residual essence within himself.
Although he had long retired from the Ultra Guard, Kazamori made his occasional intervention to save his former teammates from aliens posing as TDF officers and the Plant Life Form from both sides trying to capitalize her status.
[1][2] In Heisei Ultraseven, the Ultra Guard (ウルトラ警備隊, Urutora Keibitai) and Terrestrial Defense Force (地球防衛軍, Chikyū bōei-gun), abbreviated as UG (ユー・ジー, Yū Jī) and TDF respectively, were never disbanded after Seven's departure from Earth in the past.
In the novel adaptation, he was revealed to have lost his girlfriend, Miku, in that alien invasion after her transport airplane was targeted, leaving Kaji with their engagement rings as her memento.
[1] He proposed the Friendship Plan (フレンドシップ計画, Furendoshippu Keikaku) to the TDF, which involved the interstellar bombing planets with intelligent life forms that were percecive as potential threats to Earth's safety.
Eventually in I am an Earthling, Kaji was revealed to have conspired with TDF's Public Security Bureau in silencing those who knew about the Omega Files, such as former Ultra Guard captain Kiriyama and came close to executing Seven while he was in disguise as Kazamori.
[1][2][7] The character was absent in Ultraseven 30th Anniversary Trilogy due to Shigeki Kagemaru being preoccupied with his role as Tetsuo Shinjoh in Ultraman Tiga.
[5] Four years later in the present day, Garut put his plan to procure the Plant Life Forms to his side in motion by having the radical faction of Alien Pegassa launching their attack to absorb cities through their weaponized Dark Zone.
When the TDF tried to hunt down the Plant Life Form, Garut attempted to present himself as Kazamori's ally, but the young man saw through his trick.