At a press conference on Tuesday, Koizumi also said, "There may be a change in the schedule depending on progress in facility construction."
The Defence Ministry plans to deploy a Self-Defence Forces unit handling medium-range surface-to-air missiles to intercept aircraft and ballistic missiles on Yonaguni Island, about 110 kilometres from Taiwan and a strategic point in Japan's Nansei southwestern islands.
"We are currently carrying out necessary work, including basic studies related to the development of facilities for the unit deployment," Koizumi said.
He said that a briefing session on the matter will be held for residents of the island on March 2.
"We will give a thorough and careful explanation," the minister said.
[Copyright The Jiji Press, Ltd.]