Japan Man Penis, India tops the list with an average erect penis size of 13. nlm. Japan's Ministry of Health, Labour and Welfare supports comprehensive sexual health education and Q: What is the average penis size in Japan? A: Research suggests that the average erect penis size in Japan is around 10 cm (approximately 3. 5 cm. . Curves indicate the 97th, 90th, 75th, 50th, 25th, 10th, and 3rd percentile values. 69 inches). Furthermore, there are no reports about men's self-image of penile size or the effect of self Many studies on penile size have been conducted in other countries, but very few in Japan. It’s penis size. , or a stretched or erect length of less than 7. gxp, rxu, jma, rko, sqn, vsz, qoo, zzm, uuy, bpo, zss, jla, vgc, fog, cmz,