id = candidate ID
name = name (recorded in Japanese)
prefid = prefecture code (1-47)
pref = name of the prefecture
distnum = district id within the prefecture
party
   1--LDP
   2--DPJ
   3--Komeito
   4--JCP
   5--SDP
  33--Seikatsu no to (People's Life Party)
  34--Jisedai no to (Party for Future Generations)
  35--Ishin to to (Japan Innovation Party)
  98--others
  99--independents

dual = also ran in PR (1) or not (0)
win = 0 lost; 1 lost in the SMD but won in PR; 2 won in the SMD
inc = incumbent (1) or not (0)
votes = number of votes received
tvotes = total votes in the district
vshare = votes/tvotes*100
age = age


Source: <http://www.yomiuri.co.jp/election/shugiin/2014/kaihyou/>, accessed on December 15, 2014.