Type 4 grenade

Type 4 "Ceramic" grenade
Ceramic Grenade.jpg
Two Type 4 grenades. The one on the left doesn't have the rubber cover on.
Type Hand Grenade
Place of origin  Empire of Japan
Service history
In service 1944-1945
Used by  Imperial Japanese Navy
Wars World War II
Diameter various

Fuse delay of 4 to 5 seconds
Type 4 ceramic grenade

The Type 4 Grenade or Ceramic Grenade (四式陶製手榴弾 Yon-shiki tōsei teryūdan?) was a “last-ditch” hand grenade developed by the Imperial Japanese Navy in the closing stages of World War II.


History and development

By late 1944 and early 1945, much of the industrial infrastructure of Japan had been destroyed by Allied strategic bombing, and there was a growing shortage of raw materials due to Allied naval blockades and submarine warfare. Lacking in metals to mass produce hand grenades in the vast quantities that would be needed against the projected Allied invasion of Japan, the Imperial Japanese Navy Technical Bureau developed a design for a cheap, easy-to-make grenade made of ceramic or porcelain materials. Kilns famous for the production of traditional Japanese pottery, such as Arita, Bizen and Seto were pressed into service to manufacture these relatively crude weapons. There were a tremendous number of variants on shape, size and color, because the design depended on each kiln.


The Type 4 grenade had a fragmentation body made of terra cotta or porcelain materials. The grenade was round-shaped with a bottle neck with a rubber cover and a simple fuse. This detonator was no more than a blasting cap crimped on to a five-second length of fuse. The other end of the fuse, which was outside the rubber plug, was covered with a match-head composition. A slip-on rubber cap covered the whole neck, and fuse. A small, loose wooden block with an abrasive composition on one side was contained in the rubber fuse cover.[1]

Combat record

The Type 4 grenades were passed out in large quantities to civil defense organizations, such as the Volunteer Fighting Corps, Yokusan Sonendan, and to reservist organizations involved in preparations against the possible invasion of the Japanese home islands by Allied forces. They were also supplied to front line combat troops in large quantities, and are known to have been employed at the Battle of Iwo Jima and Battle of Okinawa. [2]



  • US Department of War (1994 reprint). Handbook on Japanese Military Forces, TM-E 30-480 (1945). Louisiana State University Press. ISBN 0-8071-2013-8. 
  • Japanese Explosive Ordnance, TM 9-1985-4. Departments of the Army and the Air Force. 1953. ASIN B000H7NCDS. 

External links

Wikimedia Foundation. 2010.

Look at other dictionaries:

  • Type 97 grenade — Type 97 Hand Grenade A Japanese Type 97 grenade, with the safety fork still in place. Type Fragmentation hand grenade Place of origin …   Wikipedia

  • Type 10 Grenade — Infobox Weapon name= Type 10 Grenade caption= A drawing of a Type 10 grenade origin=flag|Empire of Japan type= Hand grenade/Rifle grenade is explosive=yes service=1921 1945 used by= navy|Empire of Japan wars=Second Sino Japanese War Soviet… …   Wikipedia

  • Type 91 Grenade — Infobox Weapon name=Type 91 Hand Grenade caption= Type 91 grenade. origin=flag|Empire of Japan type=Hand grenade/Rifle grenade is explosive=yes service=1931 1945 used by= navy|Empire of Japan wars=Second Sino Japanese War Soviet Japanese Border… …   Wikipedia

  • Type 99 Grenade — Infobox Weapon name=Type 99 “Kiska” Hand Grenade caption=Japanese Type 99 Hand Grenade origin=flag|Empire of Japan type=Hand grenade/Rifle grenade is explosive=yes service=1939 1945 used by= navy|Empire of Japan wars=Second Sino Japanese War… …   Wikipedia

  • Type 89 Grenade Discharger — with various grenades, shells, and accessories Тип: миномёт или гранатомет Страна: История службы …   Википедия

  • Type 89 grenade discharger — Infobox Weapon name= Type 89 Grenade Discharger caption= Type 89 Grenade Discharger and various grenades, shells, and accessories origin=flag|Empire of Japan type= Grenade launcher is ranged=yes is bladed= is explosive= is artillery= is vehicle=… …   Wikipedia

  • Type 10 grenade discharger — Infobox Weapon name= Type 10 Grenade Discharger caption= origin=flag|Empire of Japan type= Grenade launcher is ranged=yes is bladed= is explosive= is artillery=yes is vehicle= is UK= service= 1921 1945 used by= Imperial Japanese Army wars= Second …   Wikipedia

  • Type 91 Grenade Launcher — The Type 91 Grenade Launcher is a grenade launcher used to launch 30mm non lethal grenades. It may come in shoulder launched, rifle attached, and vehicle mounted variants. Variants houlder FiredThe shoulder fired launcher is a single shot, manual …   Wikipedia

  • Type 87 grenade launcher — The Type 87 (also known as QLZ87) 35 mm automatic grenade launcher (AGL) is an air cooled, blowback operated, fully automatic weapon and is crew transportable (12 20 kg) with limited amounts of ammunition. It can fire a variety of 35 mm grenades… …   Wikipedia

  • Grenade Flash — Grenade à main Une grenade à main est un petit engin explosif tenu en main et destiné à être lancé, pour ensuite exploser après un court laps de temps. Le mot « grenade » est à l origine français et provient du fruit du même nom, en… …   Wikipédia en Français

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.