A quite rare video today from the NHK collection featuring Navy paratroopers during training. They fly with Mitsubishi L3Y2 transports belonging to the "1 Tokusetsu Koku Kichi-tai" (1st Special Air Base unit) as indicated by the tail marking of "1キ-XXX".
According to Akimoto, the unit was organized on June 10, 1942 in Kanoya, Kagoshima Prefecture to safekeep, maintain and transport material and provisions for air bases. A support unit for Naval units operating from land bases. The unit was first disbanded on October 1, 1942 but was reactivated as "11 Tokusetsu Koku Kichi-tai" on September 1, 1943 in Katori, Chiba Prefecture but was again disbanded on February 1, 1944. They also used the letter "T" in red for their marking.
I'm sure you enjoy the "Ride of the Valkyries" in the background. I wonder who else had the idea to use this music in a scene featuring airborne troops :)