After a life of preacher he has developed a particular concepts of Christianity, strongly influenced by Eschatology. In 1997 He established the World Economic Community Party (世界経済共同体党) based on his conviction that he is the God and Christ.I must have missed that chapter of the Apocalypse.
His concept is both religious and political, a mix of christian eschatology like Augustine's De civitas Dei and modern political moralistic conservatism. According to his program he will do the Last Judgement as the Christ but the way to do this is totally within the current political system and its legitimacy. His first step as the Savior is to be appointed the prime minister of Japan. Then he will reform Japanese society and then the United Nations should offer him the honor of its General Secretary. Then Matayoshi Jesus will reign over the whole world with two legitimate authorities, not only religious but also political.
And his tactics?
He has become well-known for his eccentric campaigns where he urges opponents to commit suicide by hara-kiri (disembowelment, note that he avoids the more polite seppuku) and says that he will cast them into Gehenna.
There's a translation of some of his campain literature here.
After the Upper House Election, Prime Minister Junichiro Koizumi should hand the seat of the Prime Minister to Jesus Matayoshi, the one true God. If he cannot, he should cut his belly and die. Jesus Matayoshi, the one true God, will throw him into the fiery depths of hell. The reason is that before you kill another person you should die yourself. The same goes to those voters who do not vote for Jesus Matayoshi, the one true God. You will understand the specific reason in election advertisements.Uh-huh.