What is a Grandparent DNA Test?
It is a DNA test to check whether a grandfather/grandmother and a grandchild are genetically related.
By analyzing 700 DNA regions, we can clearly determine the blood relationship with the grandchild most accurately, even in the absence of the grandchild's father (your son)
or mother (your daughter).
Do you have such concerns?
Comparison with Other Companies
Confirm accurate results
with over 10x the international standard
Tests examining 20-50 DNA regions cannot yield accurate results.
With seeDNA examining 700 regions, even tests with only the subjects (grandchild and grandparent) can confirm results with world-class testing accuracy.
[Expert Guide] How to Prevent Grandparent DNA Test Errors - Differences between STR and SNV methodsZero
Misjudgments
Since 2016, our in-house lab has had "0" misjudgment troubles.
Although we have overturned other companies' results, our results have never changed.Full Refund
Guarantee
In the unlikely event of an error in the test results, we will fully refund the testing fee.
You can take the test with peace of mind.Affordable
Testing
Free round-trip shipping for the test kit, free deferred payment fees, and free installment fees. There are no hidden fees not listed on this page.
You can receive world-class testing at a low price.
About Sample Collection
A DNA test requires one of the following samples:
Cotton swab rubbing the mouth
(buccal epithelial cells)
Test using buccal cells collected by lightly rubbing the inside of the mouth for about 10 seconds while twirling the sterilized genetic testing swab included in the kit.
It is a painless and simple method, so even newborns can safely collect samples.
Objects touched by individuals or
tissues like hair/nails
Even if buccal cells are difficult to collect, testing can be done with the same accuracy as buccal cells using various "objects" like toothbrushes, hair, cigarette butts, or human-derived tissues.
seeDNA Medical Laboratory publicly discloses the testing success rate of various special samples that other companies do not, so please check it.
Test without worrying about surroundings
seeDNA Medical Laboratory is a Privacy Mark certified testing institution that protects your personal information.
We will never disclose the test to anyone other than the client.
You can resolve family relationship worries you cannot tell others without worrying about your surroundings.
Correct Sample Collection Method
Japan's Top Testing Success Rate
We publicly disclose the testing success rate by sample type, which other companies do not.
Inspectors with an average of over 10 years of research experience guarantee the highest level of testing success rate in Japan, so please rest assured.*1
Testing accuracy does not vary by sample type.
other samples require manual work by inspectors, resulting in additional days and costs.
Why can we determine biological relationship
even without parents?
DNA is inherited half from each parent to the child, and then to the grandchild.
By examining 700 DNA regions, we check whether the grandchild's DNA contains "traces of DNA inherited from 1/4 of the grandfather and 1/4 of the grandmother".
3 Reasons Why seeDNA is Chosen
*2: Free re-testing is limited to buccal cells collected with our designated special swabs. An additional fee of 33,000 yen applies if special samples are used.
Testing is very simple.
1. Application
1. Application
Please apply by phone or website.
Expert staff will guide you to the optimal testing plan.
2. Kit Arrival
2. Kit Arrival
We will deliver the test kit to your specified address or post office.
It can be shipped without indicating the contents on the outside.
3. Sample Collection
3. Sample Collection
The key point!Just rub the inside of your cheek with a cotton swab. It is completely painless, so it is safe even for newborns.
Just place the collected sample in the return envelope and post it.
4. Result Report
4. Result Report
Check your test results on your online My Page or via written report.
Fast due to a fully automated system
Fast because of the highest level fully automated system in our Tokyo lab.
Prevents human error.
Testing Fees
You can choose from 2 testing methods depending on your purpose.
Includes round-trip shipping and kit costs.
There are no additional charges.Round-trip shipping and kit costs included.
No additional charges.
- Test at home without meeting anyone
- Anonymous application available
- Results notified via email/mail
- Can be submitted to courts/immigration
- Presence of an expert is mandatory
- Free witnessing during sample collection
Grandparent DNA Test
"Private Test" vs "Legal Test"
"Private Grandparent DNA Test" is for personal confirmation, where you collect the sample yourself.
"Legal Test" requires sample collection in the presence of a legal professional for submission to mediation, courts, or government agencies.
Frequently Asked Questions
Contact Us
If you have any questions,
please feel free to contact our toll-free number.
＼Open on weekends!／
Business hours: Mon-Sun 9:00-18:00
(excluding holidays)