NAHA, Okinawa — Okinawa police arrested an Osaka man Wednesday on suspicion of making a bomb threat against Kadena Air Base.

The unemployed man, Yasuo Chinen, 26, was arrested after a four-month investigation into an anonymous bomb threat posted on an Internet bulletin board, police said. The threat was traced to Chinen, who is believed to originally be from Okinawa.

Chinen, of the Konohana ward in Osaka, was arrested in his home at about 7:15 a.m.

He allegedly posted the threatening message June 22 on the “Channel 2” Internet Bulletin Board, a police spokesman said.

“Our demand is (the government) to discontinue imperialism on Okinawa. We will bomb a U.S. military tomorrow,” the threat read, according to police.

Okinawa police learned of the alleged threat to Kadena from someone browsing the Channel 2 bulletin board, a commercial Japanese-language site that allows users to post messages on a wide variety of topics.

The threat was relayed to 18th Wing officials who, in turn, filed a formal complaint with local police.

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