The government and law enforcement authorities appear to be fighting an uphill battle to prevent gangsters and other "antisocial" groups from cashing in on disposing of huge amounts of debris generated by the March 11 earthquake and tsunami, which played havoc with large areas along the Pacific coast of northeastern Japan.

These groups, including not only Japan's indigenous organized crime syndicates known as "yakuza" but a mafia based in China, are seeking to win a chunk of more than ¥15 trillion estimated to be poured into reconstruction of the areas.

On May 5, in the midst of an annual holiday season in Japan, an officer of the Tokyo Metropolitan Police Department, on his visit to Minami-Soma City in Fukushima Prefecture, which was hard hit by the calamities, was flabbergasted to find a Chinese man known as a leading figure in the "China mafia."