Japan disaster: Latest updates

9.00am

Here's a short

history of tsunamis in Japan

.

8.35am

Japan-based retail chain Uniqlo is donating US$25 million to the Japanese Red Cross Society in support of earthquake and tsunami victims.

As explained on their

Facebook page

, the contribution includes $17 million in cash and $8 million in clothing.

8.27am

The first traces of radiation from the Japan nuclear disaster have been recorded on US soil.

Air travelers coming in from Japan have triggered radiation detectors at Chicago's O'Hare International Airport as they passed through customs. Only very small amounts of radiation were detected.

"We are aware of the radiation," said Chicago Aviation Department spokesman Karen Pride. "We are adding screenings and precautionary measures."