The Tokyo High Court on Wednesday upheld a Japanese Red Army leader's lower court-imposed life prison sentence for his role in terrorist attacks on two overseas diplomatic missions in the mid-1970s.

Haruo Wako, 58, was convicted of attempted murder and taking civilians hostage during sieges of the French Embassy in The Hague in 1974 and a shared diplomatic compound in Kuala Lumpur the following year.

Presiding Judge Ritsuro Uemura ruled that Wako was one of the masterminds behind the two attacks, in which five people were wounded.