Test library
Japanese Cedar Pollen IgE Test
The Japanese Cedar Allergy Test measures IgE antibodies to Cryptomeria japonica pollen, a major cause of seasonal allergy in Japan. It helps evaluate tree pollen symptoms in people with relevant exposure.
Order Japanese Cedar Allergy Test
Order online and visit a local collection site, or choose an at-home kit where available. No referral and no insurance required.
Order Japanese Cedar Allergy Test- Typical turnaround
- 1-3 business days
- Starting price
- From $49
- Results
- Confidential, online
Quick answer
The Japanese Cedar Allergy Test detects IgE antibodies against pollen from Cryptomeria japonica, a conifer known as Japanese cedar or sugi. It is one of the most common causes of seasonal allergic rhinitis in Japan, with pollen typically released in spring. Testing can help confirm sensitization when symptoms coincide with the pollen season or with travel to areas where the tree is common.
What this test measures
Cryptomeria japonica is an evergreen conifer native to Japan and planted widely in parts of Asia. Its pollen is a major airborne allergen in Japan, and related species such as Japanese cypress release pollen in the same season, so symptoms can overlap.
The test measures specific IgE antibodies to Japanese cedar pollen in a blood sample. A detectable level indicates sensitization, which may cause sneezing, a runny or blocked nose, itchy watery eyes, or asthma-like symptoms during the pollen season. Sensitization can be present even when symptoms are mild.
Testing may be useful for people who develop seasonal symptoms in spring, who have lived in or traveled to regions where the tree grows, or whose symptoms need to be distinguished from other pollen allergies. A qualified healthcare provider should interpret the result with the symptom pattern.
- Japanese cedar (Cryptomeria japonica) pollen-specific IgE antibodies
- Quantitative sIgE concentration reported in kU/L
- Allergen-specific IgE class on a graded scale
- Total serum IgE when included
- Blood eosinophil count when included
- Related cypress pollen markers when a panel is included
Why people order this test
- Evaluate spring seasonal symptoms that may be tree pollen allergy
- Assess sensitization after residence or travel in affected regions
- Help distinguish Japanese cedar pollen from other pollen triggers
- Add objective information when symptoms follow a seasonal pattern
- Check a specific pollen when a broader panel is not needed
- Support a clinician's allergy management planning
How to prepare
No fasting is required for this blood test. Follow the collection instructions provided by the laboratory, and note when symptoms occur during the year so the provider can compare the pattern with the pollen season.
Understanding your results
Results are usually available within one to three business days. A detectable level indicates sensitization to Japanese cedar pollen, which may or may not cause symptoms depending on exposure and the person. A qualified healthcare provider should interpret the findings with the seasonal history.
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Frequently Asked Questions
What is Japanese cedar?
Japanese cedar, or Cryptomeria japonica, is an evergreen conifer native to Japan. Its pollen is one of the most common seasonal allergens in that region.
When is the pollen season?
Pollen is typically released in spring, with the exact timing varying by region and weather. Symptoms usually follow that seasonal pattern.
Can I be sensitized without having symptoms?
Yes. A positive test indicates sensitization, but symptoms depend on exposure and individual factors. Results are interpreted with the symptom history.
Is this test useful outside Japan?
It can be useful for people who have lived in or traveled to regions where the tree grows, or whose symptoms match the pollen season.
Do other trees cause similar symptoms?
Yes. Other trees and grasses release pollen in the same seasons, so panels often test several allergens to identify the main triggers.
Ready to get tested?
Order online and visit a collection site near you, or choose a mail-in kit. No referral and no insurance required.
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