Not Necessarily 'Taller Is Better': Marriage Success Rates Plateau at 172cm—Realities of Height in Matchmaking

IBJ, Inc., Japan’s leading creator of successful marriages, has released the latest data analyzing marriage success trends by men's height, based on 19,112 successful marriage profiles.

Regarding the question of whether taller men have an advantage in matchmaking, data analysis revealed that success rates plateau after 172cm, proving that height does not automatically equate to higher success. Additionally, the most common height difference for successful couples was the husband being 13–14cm taller, highlighting the importance of balance between partners.

Two Boundaries at 162cm and 172cm According to IBJ data, the median height for successful male grooms was 172cm. The analysis revealed the following trends:

- 162cm: Marriage success rate rose to 32.3% (+4.7 points compared to 160cm or shorter). - 172cm: Success rate rose significantly to 37.4% (+3.0 points). - 174cm or taller: Success rate stood at 36.4%, showing a plateau once past 172cm.

Taller does not always mean more advantageous. Upon reaching 172cm, height appears to enter a level where it is less likely to negatively impact evaluations.

Height Disparity Disappears Among High-Income Earners Cross-analysis of annual income and height confirmed that as income rises, disparities caused by height shrink or disappear.

- Income of 4.5 million yen or less: Success rate was 10.7% for those 160cm or shorter, compared to 23.6% for those 172cm or taller (a more than twofold difference). - Income of 8.5 million yen or more: The gap between 160cm or shorter (41.8%) and 172cm or taller (43.9%) shrank to only 2.1 points.

This result indicates that as economic stability increases, the impact of height (appearance) on marriage success diminishes.

The 'Golden Ratio' for Couples: A 13–14cm Height Difference When surveying the 'height difference' of successful couples, the following trends were observed:

- Husband 13–14cm taller: The most common, accounting for 11.0% of the total. - Husband 9–16cm taller: Concentrated at 42.3% of the total.

The common theory of an 'ideal 10–15cm height difference' is backed by actual marriage data.