Based on a novel by Jiro Akagawa that was published by Kadokawa publishing company, "Sera fuku to kikanjyu" (sailor uniform and machine gun) was also Kadokawa's (and then president Haruki Kadokawa's) first attempt at movie targeted for teens and young adults featuring also a teenager in the starring role.
Izumi Hoshi (Hiroko Yakushimaru) is a normal high school student, until one day a horde of yazuka shows up at the gate of her school. Unbeknownst to her, her father was the head of a "Medaka Gumi" yakuza clan. His passing away prompted the soldiers to fetch her to become the next "kumicho" or the head of the clan. Pror to passing away, her father smuggled a heroin, and that becomes the focus of rivaling yakuza clans to take possession. When one of her soldiers gets killed, Izumi reluctantly takes charge and starts to lead her troops to face the opposing yakuza clan - the only problem is Madaka Gumi only has four yakuza soldiers where the other clans have many more.
Hiroko Yakushimaru shows her brilliant intelligence to lead the group of adults much older than her. The story seem to lack focus as different characters comes and goes, but the real focus is where's the heroin, and who hid it ? Everyone is running after the heroin and much killing goes on to find it. This all sound's serious, but it's all done in light hearted fashion (how a killing can be light, you have to see this film) to appeal to the target audiences. Towards the end, Izumi while wearing her sailor suit school uniform takes a machine gun and goes into Futoccho's (Rentaro Mikuni) office to settle the score and fires the machine gun in his office, exclaiming "Kaikan" (Feel's good) which was one of the defining moments in Japanese cinema at the time.
Hiroko Yakushimaru goes on to becoming a successful movie and TV actor and is still active today.
