tokyo leader small constitutional democratic party japan out-performed expectations october vote hop offer clear policy alternatives oust prime minister shinzo abe coalition next election one key achieve ambitious goal say party founder yukio edano economic platform put weight redistribute wealth include raise corporate tax push firm use cash reserve raise wag unless reasonable redistribution achieve growth domestic demand expand edano 53 tell reuters interview clear difference ldp say refer rule liberal democratic party cdpj form less three weeks oct. 22 election then-main opposition democratic party leader decide field candidates encourage run tokyo governor yuriko koike novice conservative party slate grab top opposition spot low house poll although 54 seat dwarf 283 abe conservative ldp since big opposition party must aim change government next election else democracy function say edano say surprise party success responsibility next general election must hold october 2021. cdpj oppose abe proposal revise article japan post-war constitution ban stand military interpret allow arm force exclusively self defence unlike authoritarian ldp stress civil right rather obligations state party appear long way go give support 7.9 percent 38.1 percent ldp survey nhk public broadcaster week edano fight word however mark contrast fail democratic party stance recent poll aim keep abe coalition win two-thirds super majority rather oust edano say would repeat mistake democrats start amalgam conservatives liberals ex-socialists end plague infighting 2009-2012 term office position clear say explain think cdpj outperform opposition rival must make ideas policies vague broaden party edano say abe big defect apparent belief majority entitle whatever want abe whose support 49 percent nhk poll saw rat sink year partly due perceptions grow arrogant democracy mean get blank cheque edano say version story fix typo pm name first paragraph japan 's constitutional democrats little party big ambition