Thanks so much for caspar for sending this one in and writing the synopsis!
ピクニック PiCNiC (1996)
Runtime: 68 minutes
Not explicitly presented as anarchist (although Tadanobu Asano’s character Tsumuji carries a black flag during a portion of the story), Picnic is 1996 film directed by Shunji Iwai starring Chara, Tadanobu Asano, and Koichi Hashizume as patients/inmates of a psychiatric hospital/prison looking to escape. The three undesirables decide to dérive their way through the city to have a picnic at the end of the world: a brief yet powerful show of agency despite being on society’s long list of ongoing casualties.