On June 27, the Upper House announced the strength of in-house groups now that Tashiro Kaoru has moved up in the proportional representation segment [to fill a vacancy]. Tashiro ran as a Democratic Party (Minshinto) candidate in the proportional representation segment of the 2016 Upper House election. He is not affiliated with any in-house group.

The strength of the House of Councillors in-house groups is now as follows.