The campaign of the house of councilors election has started today. The election will be held on July 21st. Nomination deposit for the house of councilors is 3,000,000 yen ($30,303.03 €23,076.92) in case of a candidate of prefectural district. This time 73 congressmen will be elected from the 47 prefectural districts and 48 will be elected from a nationwide list. In case of the candidate on the nationwide list, nomination deposit is 6,000,000 yen ($60,606.06 €46,153.85) per one candidate.
In terms of Nomination deposit, please see http://nbakki.hatenablog.com/entry/2013/06/23/234425 also.