Even though his nomination is opposed by the largest opposition party, Gakushuin University professor Kikuo Iwata appears to be a shoo-in to become a deputy governor of the Bank of Japan later this month, after the Diet holds its confirmation vote, likely Friday.

The Democratic Party of Japan has expressed concern that Iwata may rely on overly aggressive monetary easing in pursuit of the goal of 2 percent inflation put forward by Prime Minister Shinzo Abe, thus weakening the bank's independence from the government.

But other minority parties appear to be falling into line for Iwata.