Lambda (rocket family)

[11] Lambda series rockets did not have guidance systems, as they had the potential to be converted for offensive military use, thus interpreted as a violation of Article 9 of the Japanese Constitution.

However, future Japanese launch vehicles, such as the H-II, were allowed to have guidance systems.

The following table shows the actual configurations:[2] Lambda rockets were launched by ISAS, from Kagoshima pad L.[1][2] On February 11, 1970, the first Japanese satellite Ohsumi was launched using a Lambda 4S rocket.

[13][8] The first launch of the Lambda 4S rocket took place on September 26, 1966, from Kagoshima.

[14] A fourth-stage attitude control failed resulting in loss of the vehicle and payload.