Same-Sex Partnership Recognition
Respondents were randomly assigned to read a short passage framing same-sex partnership recognition from one of seven angles — human rights, constitutionality, social benefits, social disadvantages, international norms, national pride, or tradition opposing change — or a neutral control condition. They then rated their support for legal recognition of same-sex partnerships on a five-point scale. Results are reported as average treatment effects (ATEs) relative to the control group, estimated via OLS with HC2 standard errors.
Wave 2022 November
Results

結果変数(日本語): 現在の日本の法体系では、同性間の結婚は認められていません。あなたは現在の法律を改めて、同性婚を認めるようにすることについてどうお考えですか?(5段階:非常に賛成〜非常に反対)
Outcome (English): Support for revising the law to recognize same-sex marriage (5-point scale, Strongly support to Strongly oppose).
| 条件 (Condition) | 呈示文(日本語) | English framing |
|---|---|---|
| Control | (なし) | (no framing) |
| Tradition opposes | 日本社会では、結婚は異性同士の間のものというのが伝統です。 | Japanese society has had the tradition of marriage between opposite sexes. |
| Provides social benefits | 同性婚が認められれば、同性カップルによる子育てもしやすくなり、少子化問題の改善につながる可能性があり、日本社会にとって有益な効果が期待できます。 | If same-sex marriage is allowed, that would make it easier for same-sex couples to raise children, which has the potential for improving the problem of the shrinking population and bringing benefits to Japanese society. |
| Provides social disadvantages | 同性婚が認められれば、異性間の結婚が減り、少子化がさらに進む可能性があり、日本社会にとっての損失につながる恐れがあります。 | If same-sex marriage is allowed, that could reduce heterosexual marriages and further exacerbate the problem of the shrinking population, causing harm to Japanese society. |
| International norms | 先進国の中では、同性婚を認めている国が多く、日本でも同性婚を認めれば、日本の国際社会での評判に良い影響をもたらします。 | Many developed nations allow same-sex marriage, and if Japan does the same, that would improve Japan’s reputation in the international community. |
| National pride | 先進国の中では、同性婚を認めている国が多いですが、日本は他国のことなど気にせず、日本国の誇りを守れば良いのです。 | Many developed nations allow same-sex marriage, but Japan should not worry about other countries and maintain its pride. |
| Human rights violation | 人権やジェンダー平等の観点から、同性婚を認めないのは不公正です。 | From the perspective of human rights and gender equality, it is unfair for same-sex couples to not be able to get married. |
| Unconstitutional | 憲法に結婚は「両性の合意のみ」に基づくとされているのだから、同性婚を認めないのは公正なことです。 | Since the constitution specifies marriage to be based on “consent between two sexes”, it is fair to ban same-sex marriage. |
From Wave 2022 November.