Presented herewith are some general notes on Japanese bombs and a listing
of the types most commonly used.
a. Construction Details
Japanese bombs, in general, are made of steel and are not usually
streamlined. Except for the armor-piercing and semiarmor-piercing bombs, they are of
three-piece construction. The noise and tail units are either screwed in, welded,
spot-welded, riveted, or attached by means of screws to the body of the bomb.
The tail cones of some general-purpose bombs are filled with explosive. In
these bombs, the body and tail unit are filled in separate operations and are later
Japanese bombs use either nose and/or tail fuzes. The nose fuzes are
screwed into the nose. The tail fuzes are either screwed into the base plate, or
into the apex of the tail cone if the tail unit is filled with explosive.
b. Fillers Used in Japanese Bombs
The several types of fillers for Japanese bombs are listed below. As a
rule, they are very toxic and should not permitted to come in direct contact
with the skin.
Trinitroanisol Hexanite and anisol
TNT Lyddite (cast picric acid)
Symtrinitroanisol* Picric powder
c. Types of Bombs
| 1 kg (2.2 lbs)|| 1 kg (2.2 lbs)|
| 15 kg (33 lbs)|| 60 kg (132 lbs)|
| 30 kg (66 lbs)|| 70 kg (154 lbs)|
| 50 kg (110 lbs)|| 33 kg (73 lbs)|
| 50 kg (110 lbs)|| 250 kg (550 lbs)--|
| 60 kg (132 lbs)|| semiarmor piercing|
| 63 kg (139 lbs)|| 800 kg (1,760 lbs)--|
| 250 kg (550 lbs)|| armor piercing|
*36 percent hexanitrodiphenylamine and 64 percent trinitroanisol.