Japan Microchip and Rabies Vaccine Sequence

TLDR: Japan requires an ISO-compliant microchip to be implanted before or on the exact same day as the first rabies vaccination. Some US veterinarians apply an exception that allows microchip implantation on the day of the second vaccine, but AQS Japan states that vaccination before microchipping is normally invalid and requires prior consultation. Any sequencing error forces a complete restart of all procedures.

For a Japan pet import, the order in which the microchip and the first rabies vaccination happen is not flexible. Get the sequence wrong and every step that follows is invalid. The conflict between what the USDA permits and what AQS Japan accepts makes this one of the most operationally dangerous points on the entire route.

Japan's Microchip Sequencing Rule

Japan requires an ISO-compliant microchip to be implanted before or on the exact same day as the first rabies vaccination. The microchip number must match on every lab report, health certificate, and notification form submitted as part of the import process. A single incorrect digit on any document will halt the import.

The sequencing requirement exists to ensure the pet's identity is confirmed before any vaccination record is created. A vaccination record tied to a pet without a confirmed microchip cannot be used for Japan's import process.

What Does the USDA Permit?

Some US veterinarians apply an exception to the standard sequencing rule. Under this exception, microchip implantation is allowed on the day of the second rabies vaccination rather than before or on the day of the first.

This exception is documented in USDA guidance and is applied by some US veterinarians when preparing pets for international travel. It is a legitimate USDA position and not an error on the part of the vet or owner who follows it.

Why the USDA Exception Creates a Problem for Japan

AQS Japan, the government authority responsible for animal quarantine in Japan, states that vaccination before microchipping is normally invalid. AQS further requires prior consultation before any exception to the sequencing rule is applied.

This creates a direct conflict between two official sources. The USDA permits the exception. AQS Japan considers vaccination before microchipping normally invalid and requires prior consultation before deviating from the standard rule. An owner or vet who follows the USDA exception without prior AQS consultation risks having the entire vaccination record rejected.

Any sequencing error, regardless of which guidance was followed, forces a complete restart of all procedures - there is no partial credit and no correction pathway after the fact.

What Is the Safe Operating Rule?

Given the conflict between USDA and AQS Japan positions, the safe operating rule is to always microchip first. If timing requires both to happen on the same day, the microchip must be implanted before the vaccination is administered at that same appointment.

Never rely on the USDA exception for a Japan move without prior consultation with AQS Japan. The USDA exception may be technically permitted under US guidance, but AQS Japan's position means it carries significant risk of invalidating the entire process. This is closely related to Japan's 91-Day Rabies Vaccine Age Rule, which governs a separate but equally strict timing requirement on the same import.

What Microchip Standard Does Japan Require?

Japan requires an ISO-compliant microchip conforming to ISO 11784 and ISO 11785. The microchip number must appear consistently and correctly on every document in the import package, including all lab reports, health certificates, and notification forms.

A single incorrect digit anywhere in the documentation will halt the import. Before any documents are submitted, verify that the microchip number recorded at every vet visit matches exactly.

The microchip sequencing rule is one of the first decisions made on a Japan pet import, and a mistake at this stage invalidates everything that follows. Contact us to get a free quote.

Frequently Asked Questions

When must the microchip be implanted relative to the rabies vaccination for Japan?

The microchip must be implanted before or on the exact same day as the first rabies vaccination. If both happen on the same day, the microchip must be implanted before the vaccination is administered at that appointment.

What is the USDA exception and why is it a problem for Japan?

Some US veterinarians apply an exception allowing microchip implantation on the day of the second rabies vaccination rather than before the first. AQS Japan states that vaccination before microchipping is normally invalid and requires prior consultation before any exception is applied. Following the USDA exception without prior AQS consultation risks invalidating the entire vaccination record.

What happens if the microchip and vaccination sequence is wrong?

Any sequencing error forces a complete restart of all procedures - there is no correction pathway after the fact. The safe operating rule is to always microchip first, on the same day as the first vaccination if needed, never after.

What microchip standard does Japan require?

Japan requires an ISO-compliant microchip conforming to ISO 11784 and ISO 11785. The microchip number must match exactly on every lab report, health certificate, and notification form. A single incorrect digit will halt the import.