[6 months to 4 years old] New coronavirus vaccination information

  • Vaccines for infants (6 months to 4 years) are given in total of 3 doses to complete the first dose (1 set of 3 doses).
  • At this time, the period during which you can receive the new coronavirus vaccine for free is "until March 31, 2023".
  • In order to complete the three vaccinations by March 31, 2023, it is necessary to receive the first vaccination by January 13, 2023 (January 15 at the latest) in principle. .
  • Even if you can't complete all three doses, you can expect a certain effect (*), so even if you can't complete the third dose by March 31, 2023, Please consider the 1st and 2nd inoculations.

*From the materials of the 21st Ministry of Health, Labor and Welfare Local Government Explanatory Meeting on December 16, 2022

table of contents

  1. For those who wish to be vaccinated and their guardians
  2. Period during which vaccination can be received
  3. Inoculation target
  4. Vaccine used
  5. Number of inoculations/Inoculation intervals
  6. Inoculation ticket shipping schedule
  7. Inoculation venue
  8. Reservation method

For those who wish to be vaccinated and their guardians

vaccine instructions

Pfizer Co., Ltd. New Corona Vaccination Manual (for infants (6 months to 4 years old) vaccination)

*Not included in the vaccination ticket shipped on October 24. Please check and understand the contents of this manual before making a reservation for vaccination.


  • Ministry of Health, Labour and Welfare


  • Pfizer


Reference information

Precautions for vaccination

  • Parental consent is required for vaccination of children. No vaccination will be administered without parental consent.
  • When receiving the vaccine, we ask that you have correct knowledge of both the effectiveness of preventing infectious diseases and the risk of side effects, and make decisions based on your parents' intentions. .
  • Please consult your family doctor, etc. about the vaccination interval between the new corona vaccine and other vaccines. In principle, you cannot receive other vaccines at the same time or two weeks before or after (except for influenza vaccination).
  • If your child has an underlying disease, or if you have any questions or concerns about vaccinations, please consult your family doctor.

Efficacy and safety (side effects)

Pfizer's new corona vaccination instruction manual (for infants (6 months to 4 years old) vaccination) shows the effectiveness and safety (side effects) of vaccination as follows.


This vaccine is manufactured by Pfizer. Prevents the onset of new coronavirus infections.
One month after the 3rd dose of this vaccine, immunogenicity met the pre-specified criteria, and an increase in neutralizing antibody titers against Omicron strains was confirmed. It is said to be possible. (It has been reported that the onset prevention effect after the third vaccination under the Omicron strain epidemic is 73.2%.)

side reaction

  • The main side effects include pain at the injection site, headache, pain in joints and muscles, fatigue, chills, and fever. Shock and anaphylaxis are rare and serious side effects. In addition, since this vaccine is a new type of vaccine, it may cause symptoms that have not been clarified so far. If you notice any worrisome symptoms after vaccination, please consult with your vaccination doctor or family doctor.
  • Although very rare, cases of suspected myocarditis or pericarditis after vaccination have been reported. If you experience symptoms such as chest pain or difficulty breathing within a few days after vaccination, or if you continue to have a loss of appetite or energy, please see a medical institution immediately.
  • Although very rare, Guillain-Barré syndrome has been reported after mRNA vaccination. After vaccination, if you experience symptoms such as not moving your limbs or feeling weak, or if you continue to have a loss of appetite or energy, please consult a medical institution immediately.

Precautions and things to bring on the day of vaccination

  • Please be sure to have a guardian accompany you.

*If the guardian cannot accompany the child due to unavoidable circumstances, a relative who knows the health condition of the person receiving the vaccination can accompany the child upon request from the guardian. A power of attorney is not required, but a parent/guardian should sign the name of the parent/guardian in the signature column of the screening form.

  • If the child to be vaccinated or the accompanying guardian has a fever (37.5°C or higher) or is not feeling well, please cancel the reservation and consider inoculating another day.
  • On the day of the event, please come in clothes that allow you to easily show your shoulders or thighs. In particular, children under the age of 1 will be vaccinated on their thighs, so please dress accordingly.


inoculation ticket Please do not remove the sticker and bring it along with the mount.
Completed pre-examination form

In the phone number field, write the phone number where you can be contacted during the day.
Parents should sign their name in the signature column.

Confirmation documents of the person and guardian Health insurance card, my number card, residence card, etc.
Maternal and Child Health Handbook

Please bring it with you to check the vaccination interval with other vaccines.

*If you do not have it on the day of vaccination, you may not be able to receive the vaccination depending on the venue.

*If you have lost your Maternal and Child Health Handbook and wish to have it reissued, please apply here.

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Period during which vaccination can be received

Until March 31, 2023

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Inoculation target

Those who are 6 months to 4 years old on the day of vaccination and have a resident card in Adachi Ward, in principle.

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Vaccine used

Pfizer Infant (6 months to 4 years)

*It is different from the Omicron strain vaccine.

*Vaccines for ages 12 and over and vaccines for ages 5 to 11 are different types of vaccines with different administration and dosage.

*The vaccine to be used is determined based on the age at the time of the first vaccination. If a child was 4 years old at the time of the 1st dose and turned 5 years old by the time of the 3rd dose, the 3rd dose should be given the same infant vaccine (6 months to 4 years) as the 1st dose. use.

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Number of inoculations/Inoculation interval

Number of inoculations 1 set with 3 doses (a total of 3 doses completes the first dose)
Inoculation interval [2nd vaccination] Usually 3 weeks after the 1st vaccination [3rd vaccination] 8 weeks or more after the 2nd vaccination


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Inoculation ticket shipping schedule

Shipped on Monday, October 24, 2022

  • After that, it will be shipped sequentially to those who reach 6 months old
  • It may take up to a week for the vaccination ticket to arrive at your home after it is shipped.
  • Please refrain from contacting the post office to confirm delivery.

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Inoculation venue

List of vaccination venues

  • Medical institutions on the list of vaccination venues will be added from time to time. Even if it is not on the vaccination venue list, there are medical institutions where you can get vaccinated.
  • Please come to the vaccination venue by public transportation or park appropriately according to traffic rules.
  • Please contact each medical institution if you are bringing a small child who is not eligible for vaccination.

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Reservation method

The reservation method differs depending on the vaccination venue. For details, please check the list of vaccination venues.

Book online (24 hours reception)

Many medical institutions that vaccinate infants from 6 months to 4 years old do not use the ward's reservation system, so there are few slots that can be guided by the reservation system vacant slot information. I'm here.

*Reservations can be made up to 2 days before the vaccination date.

open booking system

Open reservation system vacancy information

Make a reservation by phone (reservation/consultation dial)

You can make an appointment at a medical institution that uses the city's reservation system.


Phone number: 0120-230-377
* If you are using a smartphone, tap the phone number above to call us without fail.

day of week

Reception time
Monday to Friday 8:00~20:00
Saturday Sunday 8:00~18:00
  • This may change in the future.
  • Free dial
  • Supported languages: Japanese, English, Chinese

Direct appointment with a medical institution

For medical institutions with phone numbers listed in the list of vaccination venues , please call them directly to make an appointment.

Make a reservation at the counter (no prior application required)

The Vaccination Reservation Support Desk will use terminals prepared by the city to make new reservations/changes/cancellations for venues where vaccination reservations can be made through the city's reservation system.

  • Location: Ward Office Central Building 2nd Floor In front of the Ward Administration Information Division
  • Reception hours: Weekdays, 9:00 a.m. to 5:00 p.m.

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