Type 66 helmet

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Type 66 helmet
66式鉄帽.JPGType 66 Helmet liner.jpg
The Type 66 helmet with the JGSDF Type II helmet cover (Top)
The Type 66's helmet liner (Bottom)
Type Combat helmet
Place of origin Japan
Service history
In service 1966-Present
Used by Japan
Production history
Designer Major Harold G. Sydenham[1]
Weight 1.4 kg (3.1 lb)[2]

The Type 66 (66式鉄帽, Rokurokushikitetsubou) is a Combat helmet that was used by the Japanese Self-Defense Force after the adoption of the M1 helmet, supplied by the United States when the former National Police Reserve was established. It has not been exported out of Japan since it was adopted by the JSDF.

In the JSDF, it is known as Teppachi.[2]


The Type 66 helmet was adopted by the JSDF in 1966, replacing the numerous M1 helmets supplied to them by the US.[2] This is due to meeting Japanese requirements, since their typical head size cannot always fit underneath a M1.[2]


JGSDF soldiers of the 8th Infantry Regiment practice carrying a mock casualty during exercises while wearing Type 66 helmets.

The material of the helmet liner is simple molded resin. The total weight of the outer shell and helmet liner is 1.4 kilograms with the shell made out of manganese steel.[3] The Type 66 can take various helmet covers and be equipped with removable chin straps.[4] Its construction is based on the M1.[5]

The Type 66 is still in use in non-combat missions, training exercises, parades and in the reserve forces.[6][7][8]