2 points, before 12.5 percent, to 8,422.21 wearing afternoon trading Tuesday, extending losses from the prior period. The Nikkei had tumbled further than 6 percent Monday on the elementary trading time since the devastating earthquake and tsunami struck the northeastern coast Friday, washing away towns and slaughter thousands of frequent. Several nuclear power plants were damaged by the earthquake. happening a nationally televised statement, Prime Minister Naoto Kan held radiation has swell from four reactors of the Fukushima Dai-ichi nuclear deposit happening Fukushima province, lone of the hardest-hit happening Fridays 9.