April 14, 2026
Even if the desire to have children is the same for everyone, there isn’t just one path to achieving that goal.
Many people who are researching sperm donation come across terms like “adoption” and “foster care” and begin to wonder which option is right for them. In this article, we’ll carefully compare four options—sperm donation, special adoption, regular adoption, and the foster care system —and outline the differences between them and who each is best suited for.
Whether you decide, “After comparing the options, I’ll go with sperm donation after all,” or “Adoption feels more like the right choice for me,” either is fine. What’s important is making a choice based on your own free will after fully understanding your options.
First, let's sort out the four options.
In this article, we’ll discuss the following four methods for having children.
① Pregnancy and Childbirth Through Sperm Donation: A method in which a woman receives a sperm donation from a third-party donor and becomes pregnant and gives birth.
② Special Adoption: A system whereby children from disadvantaged family backgrounds (generally under the age of 15) are welcomed into a family in a manner equivalent to that of a biological child. The legal parent-child relationship with the biological parents is terminated.
③ Ordinary Adoption: A system that legally establishes a parent-child relationship with a child. The parent-child relationship with the biological parents remains intact. This is possible even for adults.
④ Foster Care System: A system in which children who cannot be raised in their own homes are placed with a foster family for a specified period of time. No legal parent-child relationship is established.
We'll now take a closer look at what these four have in common and how they differ.
Differences in Views on “Blood Ties”
First, let's start by looking at the most fundamental difference.
In sperm donation, the child is biologically related to the mother. A child conceived using the donor’s sperm and the mother’s own egg is, genetically speaking, “her own child.” She goes through the process of pregnancy and childbirth herself.
In special adoption, regular adoption, and foster care, there is no genetic connection to the child. These arrangements involve welcoming a child who has already been born into the family.
For those who wish to “have a child who inherits their genes,” sperm donation may be the right choice, while for those who strongly desire to “become a parent to a child who has already been born,” adoption or foster care may be more suitable.
It’s perfectly fine to be honest about either feeling. In fact, figuring out which one you lean toward will help you make a choice you won’t regret.
A Realistic Comparison of Age, Duration, and Cost
Sperm Donation
- Child's Age: 0 years and up (starting from pregnancy and childbirth)
- Duration: In some cases, pregnancy may occur as early as a few months to about a year.
- Cost: While costs vary depending on the donor and method, they typically range from tens of thousands to several hundred thousand yen in medical expenses. On this site, donors cover the costs associated with procedures such as artificial insemination, thereby lowering the financial barrier.
- Age Limit: Medically speaking, this is a realistic option up to the early 40s. Results vary by individual depending on AMH levels (ovarian reserve).
Special Adoption
- Age of children: Generally under 15 years old (mostly infants and toddlers)
- Duration: It’s not uncommon for it to take several years to find a match. The waiting period is long.
- Cost: If you go through a private placement agency, it can cost anywhere from several hundred thousand yen to over 1 million yen. Going through a public agency is nearly free.
- Age of adoptive parents: While there is no specific upper age limit, factors such as the age difference between the parents and the child are taken into consideration. The general guideline is 25 years of age or older.
Ordinary Adoption
- Children's ages: No restrictions (adults are also welcome)
- Duration: In some cases, the process is simpler than that of special adoption.
- Cost: Approximately the cost of processing the application (may include attorney and judicial scrivener fees)
- Main uses: Legal formalization of step-parent-child relationships, adoption within the family, etc.
Foster Care System
- Child's age: 0 to under 18
- Duration: Varies from short-term (a few weeks) to long-term (several years)
- Costs: Child-rearing expenses are covered by the national government and local governments. There are virtually no out-of-pocket costs.
- Characteristics: No legal parent-child relationship is established. There is a possibility that the child may return home.
The Issue of “Telling Children”
An important theme common to both sperm donation and adoption is “disclosure.”
In recent years, the prevailing view regarding when to disclose the truth to children born through sperm donation has been that “it is better to tell them at an early stage.” Children have the right to know “where they came from,” and it is believed that revealing the truth gradually and naturally from a young age—rather than having them find out suddenly after reaching adulthood—leads to less confusion regarding their identity.
The same applies to disclosing the adoption. Raising a child while concealing the fact that they are adopted carries the risk of affecting the child’s self-identity. Even in special adoption cases, early disclosure is now recommended.
No matter which option you choose, it’s essential to think in advance about “when and how to tell your child.”
This website supports the disclosure of donor information. We have established a system that allows me, as the donor, to disclose my information should the child wish to know it in the future. This is because we believe it is important to respect the child’s “right to know.”
The Reality Faced by Single Women and LGBTQ Couples
Currently, sperm donation is a relatively accessible option for single women, lesbian couples, and FTM transgender individuals. Although legal frameworks in Japan are still lagging behind, when proceeding with a private donor based on mutual consent, the process can be carried out according to one’s own wishes without requiring anyone else’s permission.
Prior to the 2020 amendment to the law, only married couples could apply for special adoption, but now single individuals can also apply. However, in reality, it is more difficult for them to be matched with a child compared to married couples. For same-sex couples, the situation remains even more challenging because they are not legally married.
While policies regarding the foster care system vary by municipality, an increasing number of local governments are now allowing single individuals to register as foster parents. However, there are significant regional differences in how same-sex couples are treated.
When considering “which options are realistically available given one’s circumstances,” sperm donation is currently one of the most accessible options for single women and members of the LGBTQ community.
Current Legal Situation and Future Changes
In Japan, the legal frameworks for sperm donation, adoption, and foster care have not yet fully caught up with the needs of these areas.
Regarding sperm donation, the “Act on the Provision of Assisted Reproductive Technology and the Establishment of Systems for Related Consultations” was enacted in 2020; however, detailed rules concerning third-party donation remain a matter for future consideration. The treatment of private donations is still in a gray area.
Under the 2020 amendments, the age limit for special adoption was raised from under 6 years old to under 15 years old, and single individuals are now eligible to apply; however, the system is still in a transitional phase.
Society is undoubtedly changing. It is important to distinguish between “the current limitations of the system” and “the areas that will change in the future.”
A Profile of the People Suited for Each Choice
Please consider this merely as a general guideline.
Who Is Suited for Sperm Donation?
- I want to experience pregnancy and childbirth
- I want to have a genetic connection with my child
- I'd like to move forward on this on a relatively tight timeline.
- I want to move forward while receiving financial support (child support)
- Single or in an LGBTQ couple
People Who Are Suited for Special Adoption
- I want to be a parent to a child who has already been born
- Willing to accept long wait times and the screening process
- Wishing to Establish a "Legal Parent-Child Relationship" with the Child
- Has a partner, or—even if single—is strongly committed to long-term parenting
Who Is Suited for the Foster Care System?
- First, I’d like to start with the experience of “raising a child.”
- I want to keep the financial burden to a minimum
- Placing greater emphasis on “living together” than on legal parent-child relationships
- They are also considering the possibility of adoption
If you're unsure, why not start by talking to them?
There is no “right” answer to the question, “Should we use a sperm donor or adopt?” Neither option is right, nor is either one wrong.
However, when people are on the fence, they’re often in a state where they’re thinking, “I’d like a little more information” or “I’d like to talk to someone about it.”
On this site, we welcome consultations not only about sperm donation but also from those who are still at the stage of thinking, “I’m considering adoption, but I’m not sure which option is right for me.”
As the donor, I am in my early 50s and run my own company. Driven by my regret at not being able to have children of my own, I began supporting others through sperm donation in 2023. I also continue to provide support in the form of 100,000 yen per month in child support after DNA verification.
Even if you haven't made up your mind yet but would like to discuss it, please feel free to contact us via LINE or email. We've created a space where you can talk at your own pace.
Click here to contact us via LINE Click here for the contact form
Summary
- While sperm donation, special adoption, regular adoption, and foster care all share the same goal of “having a child,” their processes, legal relationships, costs, and timeframes are completely different.
- Sperm donation is the only way to become pregnant and give birth while maintaining a genetic connection.
- Adoption and foster care are ways to become a parent to a child who has already been born
- For single women and LGBTQ couples, sperm donation is currently one of the most accessible options.
- The approach to telling children is important regardless of the option chosen. Early and natural disclosure is recommended.
- We welcome consultations even if you're still undecided. It's worth talking to us before you make a decision.
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