With Japan facing the danger of nuclear radiation, IT giants TCS, Infosys and Wipro have offered their employees there the option of coming back home while allowing local workers to shift to safer locations.

"The safety of our employees is our top priority...We are ready to relocate our Indian employees and their families back to India as well as move our local Japanese employees and their families to other locations of safety," a TCS spokesperson said.

According to software representative body Nasscom, Japan contributes about two per cent to the Indian IT-BPO export revenues.

"All of our employees are safe and continue to work with our clients. However, we are giving an option to families of employees to return to India and we will help facilitate the same," Wipro Technologies Senior Vice President (HR) Saurabh Govil said.

He added that the company is using options like allowing employees to work from home. The company is also gearing up its offshore support to ensure business continuity to its clients, Govil said.

An Infosys spokesperson said, "While progress is being made, recent reports warrant concern around developments...In cases where employees and their families have expressed a desire to return temporarily to safety we are facilitating their travel."

The company will continue to support its clients locally and from offshore locations till situation stabilises, the spokesperson added.

TCS has over 200 people in Japan, while Infosys and Wipro have over 250 people and 400 employees, respectively.

HCL Technologies said its employees were safe but did not say if it is planning to get their employees back home.

Japan is facing a radiation scare with some explosions across various reactors being reported, following a massive earthquake and a subsequent tsunami on March 11.

The tsunami left thousands of people dead or unaccounted for, as houses were it swept away, ships overturned and several buildings, including a petrochemical plant, catching fire.

Japanese Prime Minister Naoto Kan has warned that the radiation had spread from the crippled reactors and there was "a very high risk of further leakage".

He asked an estimated 1,40,000 people living within 30 kms of the facility north of capital to remain indoors and to conserve power as threat loomed large of Japan's crisis turning into a Chernobyl-like disaster.