Japanese Gender Selection Supplements

Trusted for over 70 years

Japanese Gender Selection

Shipped directly from Japan with worldwide delivery available.

Sugiyama OB-GYN Hospital

Sugiyama Obstetrics & Gynecology Hospital (Sugiyama OB-GYN Hospital) is one of Japan’s leading obstetrics and gynecology hospitals. Based in Tokyo Japan, it has a history of more than 70 years. The Rincal supplement series is among the hospital’s best-known products.

•Boy gender selection
Rincal calcium: about 73%
Rincal calcium + Green Jelly: about 74%-82%

•Girl gender selection
Rincal Pink Jelly: about 76%

Note: The success-rate figures above are cited from information published on Sugiyama Clinic Hospital’s official website.

Made in Japan
From Sugiyama Obstetrics and Gynecology in Japan.

Gender Selection for a Boy

Rincal calcium + Green Jelly

Made in Japan.
Gender selection for a boy guide: a 2-month daily preparation routine, ovulation-day timing, and ovulation tracking tips (BBT & tests). Rincal tablets with optional Green Jelly.

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Gender Selection for a Girl

Pink Jelly

Made in Japan.
Girl gender selection guide: focus on intercourse 2 days before ovulation, ovulation tracking (BBT & tests), and optional Pink Jelly.

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Guides & Resources

How to Increase Chances of Having a Girl Naturally

Trying for a girl naturally? This guide explains the timing basics, cycle tracking methods, Pink Jelly support, and preparation steps many couples explore when planning for a girl.

How to Increase Chances of Having a Boy Naturally

Trying for a boy naturally? This guide explains the most commonly discussed methods, including ovulation timing, fertile window tracking, cervical mucus changes, and boy-planning support routines, while keeping expectations realistic.

Couple learning about the timing method for gender selection with ovulation calendar and natural planning notes

Does the Timing Method Work for Gender Selection?

Does the timing method work for gender selection? This guide explains what the timing method is, why many couples try it, what its limits are, and how to set realistic...