An M69 incendiary shell found near Kanamecho 1-chome, Toshima-ku on April 15, 1945.
Incendiary bombs include electron incendiary bombs, oil incendiary bombs, and yellow phosphorus incendiary bombs, and this incendiary bomb is an oil incendiary bomb.
The hexagonal pillar contains highly sticky oil and fat (napalm), and when it lands on the target, the fuse at the tip bursts, and the lit oil and fat scatter around, burning houses. The tail has a ribbon attached to it that makes it fall vertically.
It is the incendiary round most used by the U.S. in air raids on the mainland.
![](https://pbs.twimg.com/media/E-kjq37VEAEbnYg?format=jpg&name=large)