Short for 参議院 (Sangiin, “House of Councillors”).

to decide to do something: to do something on purpose / to perform a maneuver, to carry out a tactical action / to decide on an opinion: to believe in an opinion firmly

riding out on a horse; often to a battlefield / coming forward, especially by running as a candidate in an election

ride out on horseback, often to battle / come forward, typically to run as a candidate for an election

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend

he; boyfriend

(politics) election / (politics, informal) campaigning

elect

(idiomatic) to make up one’s mind, to decide