The realty arm, Mitsubishi Estate, is the ultimate coupon clipper, with downtown Tokyo landholdings going back more than a century.

FORBES: Setting sun

The agency said police were also investigating Mitsubishi Estate, Hitachi and other companies said to have made large payments to Tei.

BBC: Japanese police raid Mitsubishi, Toshiba headquarters

Corp added 0.6% and Mitsubishi Estate rose 4.2%.

WSJ: Property Curbs Weigh on China Shares

Mitsubishi Real Estate, part of the same keiretsu or business group, is the buyer.

CNN: SELLING THE COMPANY CASTLE