The embassy also warned Saudi students studying in Japanese institutions to return only after confirming with the Saudi mission that it was safe for them to do so, the Saudi Press Agency reported Thursday.

The Saudi Embassy in Tokyo can be contacted on (0081) 335895241, (0081) 33589 5241, (0081) 90558 33862, (0081) 9061 490641. The telephone number of the Saudi cultural attaché is (0081) 3534 83011.

The embassy’s e-mail is [email protected] while the cultural attaché’s website is [email protected].

According to latest reports, radiation continues to leak from a nuclear plant 240 km northeast of Tokyo after it was hit by the earthquake and the ensuing tsunami.

Shops across Tokyo began rationing milk, rice and water as panicky city residents were buying everything to guarantee that they had enough safe food in stock.

Radioactive cesium 1.8 times higher than the standard level was found in a green leafy vegetable grown in a research facility in Tokyo, Kyodo news agency reported Thursday, citing the Tokyo Metropolitan government.

Radiation contamination has been found in various vegetables near the damaged nuclear power plant in Fukushima Daiichi, but this was the first to be detected in a vegetable grown in the capital.

Shipping industry officials meanwhile said German shipping companies are avoiding Tokyo port due to radiation fears and Japan potentially faces severe supply chain bottlenecks as vessels get diverted.

Any logistical setback could mean major delays and seaborne congestion at Japan's terminals including Tokyo, hindering recovery efforts in the wake of the earthquake.