As the Olympic bid-rigging inquiry broadens, ad agency Hakuhodo and others are searched.

Japanese prosecutors and a fair trade watchdog searched the offices of major advertising agency Hakuhodo Inc on Monday, including its headquarters, on suspicion of rigging bids for contracts related to test events for last year's Tokyo Olympics, just days after raiding another ad giant in the same case.

The latest searches, which also included Tokyu Agency Inc and two event production companies, came as investigations into the To....