He added that the lock on the container had been replaced before it left port in Malaysia.
The items, which are 14 per cent thinner than conventional products at 0.02 millimetres, are worth 120 million yen (£910,000) at Japanese retail prices, he said.
‘This has never happened to us before and we are very perplexed,’ Wakui told AFP. ‘We are not certain if it was of a premeditated nature.’
Sagami Rubber Industries was founded in 1934 and was Japan’s first condom manufacturer.