id = candidate ID
name = name (recorded in Japanese)
prefid = prefecture code (1-47)
pref = name of the prefecture
dm = district magnitude
win = win (1) or lose (0)
inc = incumbent (1) or not (0)--this is about whether the candidate was a member of the House of Councillors before the election, not necessarily from the same district.

party
   1--LDP
   2--DPJ
   3--New Komeito
   4--JCP
   5--SDP
  24--Minna no to (Your Party)
  25--Kofuku Jitsugen to (Happiness Realization Party)
  30--Nippon Ishin no kai (Japan Restoration Party)
  32--Midori no kaze
  33--Seikatsu no to (People's Life Party)
  98--others
  99--independents

votes = number of votes received
vshare = vote share
rank = rank of finish
age = age

Source: <www.yomiuri.co.jp/>, accessed on July 22, 2013.