This paper aims at examining why and how the norm of arranged-marriage by go-between was strongly persistence during prewar Japan, though since Meiji era it had been gradually difficult to deny the idea that love was essential for marriage. Therefore, it is important to rethink the relationship between love marriage and arranged-marriage. Through analyzing the ideology and the logic of the discourse on arranged-marriage or marital mediation, this paper investigates this question.
Firstly, I examine what logics coped with the contradiction between the affirmative discourses on love and the persistence of arranged-marriage norm. This study shows that there was the dichotomy of discourses on love: public（ social） love and private （individual） love, and that the affirmative discourses on love contained a moment of encouraging the normalization of arranged-marriage.
Secondly, by analyzing the discourses on eugenics and its national policy, I investigate the complex of the ideology regarding marital mediation. In the wartime Japan, it was thought that the scientific principle that a person's character depended on heredity should be applied to the regulation of people's marital behaviors and mate choice by the hand of the Government. On a variety of principles based on eugenics, the contradiction or rivalry between arranged marriage and love marriage was dissolved.
These results suggest that the arranged-marriage was not simply traditional or familistic marriage, but also the marriage suitable to modern ideals. Therefore, it is important to describe the relationship between arranged-marriage and love marriage as complement rather than as binomial.

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