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COVID-19 vaccinations for infants and very young children (6 months to 4 years old)

Last updated date:2022/11/9

Important note

The primary COVID-19 vaccination for infants and very young children is a series of three doses. The period through which the vaccine will be distributed for free is currently the end of March 2023, and as the vaccination is a series of three shots, to complete the primary vaccination, in general, the series must be started by January 13 at the latest.

About COVID-19 vaccinations for infants and very young children (6 months to 4 years old)

Who is eligible?

Infants at least 6 months old through young children up to 4 years old.

When is it available?

Through 31 March 2023.

Vaccination cost

Vaccinations will be administered using public funds, and are free of charge for everyone.
*However, there is a possibility you will have to pay for doctor fees if you visit a clinic before or after the vaccination.

Vaccine type and interval between doses

Once all three doses have been taken, the primary vaccination series is complete.

Vaccine type and interval between doses
Vaccine used

Interval between 1st and 2nd doses

Interval before 3rd dose
Pfizer vaccine for infants and very young children (*1)3 weeks between 1st and 2nd dose (*2)

8 weeks between 2nd and 3rd dose


(*1) Different vaccine types and dosages are used for children ages 5-11 and for those 12 and older.
(*2) Even if more than three weeks pass between the 1 st and 2 nd shot, there is no need to start the series over. It is recommended to get the 2 nd shot as soon as the child is eligible.

[Vaccines for influenza and other diseases, waiting period after taking other vaccines ]

  • Doses of the COVID-19 vaccine and influenza vaccines may be taken at the same time with no waiting period.
  • Generally vaccines other than the influenza vaccine may not be taken at the same time. Either the other vaccine or the COVID-19 vaccine may be taken if an interval of 2 weeks has passed.

Parent or guardian must consent and accompany the young child for them to get the vaccine

Parents and guardians are asked to ensure they are familiar with accurate information related to both the vaccines’ efficacy and risks and to discuss vaccination with their child before they make the decision to vaccinate or not. Vaccinations will not be administered without the guardian’s consent. Forcing people around you to be vaccinated or showing discriminatory treatment to those who have not been vaccinated is unacceptable.

Potential side effects after getting the shot (side reactions)

  • COVID-19 vaccines have been seen to sometimes cause side effects after they are administered, such as pain around where you were given the shot, headaches, fatigue, muscle and joint pain, chills, diarrhea, or fever. In very rare cases, recipients may experience severe symptoms such as shock or anaphylaxis. Also, as this is a newly developed vaccine, there is a possibility that other unexpected symptoms may be experienced. If you are concerned about a symptom that occurs after getting the vaccine, please consult the vaccinating doctor or your regular doctor.
  • While extremely rare, cases have been reported where recipients developed myocarditis or pericarditis. If the recipient, within a few days of getting the vaccine, experiences chest pain, shortness of breath, or continually demonstrates a lack of appetite or vigor, consult a doctor or health care facility immediately.
  • While extremely rare, there have been reports of developing symptoms of Guillain–Barré syndrome after receiving the mRNA-type vaccine. After getting the vaccine, if the recipient has a hard time moving their arms or legs, or continually demonstrates a lack of appetite or vigor, consult a doctor or health care facility immediately.

Call center for inquiries about side effects (Kanagawa-ken COVID-19 Side Reactions Consultation Call Center)

Phone number

045-285-0719(open 24 hours)
*Guidance in languages other than Japanese also available

For inquiries about:

Side effects that continually persist after getting the shot or for specific issues that warrant informed medical consultation.
(Introductions to individual health care facilities are not provided. If you wish to be examined, consult your regular physician or the facility where you got the vaccine.)

Vaccinations for children turning 5 years old (for young children who are currently 4 years old)

Depending on the timing of the vaccination, the vaccine used may be different.

  • If the child had their first dose at 4 years old, then the subsequent second and third doses will also use the same vaccine type.
  • If the child was already 5 years old when they got their first dose, then they will receive the vaccine intended for children ages 5-11. The primary series for that vaccine is considered complete after 2 doses.
  • Note that for the purposes of the vaccination, children will be considered 5 years old as of the day before their birthday.

Distribution schedule for vaccine vouchers

See this page(外部サイト) for the distribution schedule.

How to get the vaccine

A reservation is required to get the vaccine. (Residents who have received a voucher may make reservations.) Have your vaccination voucher ready when making your reservation.
Medical facilities (such as pediatric clinics) experienced in vaccinating very young children (ages 6 months to 4 years) will administer the COVID-19 vaccine.
*Depending on the facility, reservation methods and available times may vary.

Reservations by phone (call center)

City of Yokohama COVID-19 Vaccination Call Center
Phone number0120-045-112

Hours

9 am to 7 pm (including weekends and holidays)
Language guidance8 languages: Japanese, English, Chinese, Korean, Vietnamese, Nepalese, Spanish, Portuguese
Precautions

*Take care to dial the correct number. Please also be sure to double-check the number when redialing.

*The call center will close even once all reservation slots are filled, even if it is before 7:00 pm.
Dedicated cancellation number0120-045-154 (9 am to 7 pm)

Reservations by FAX (for residents with hearing loss) *Japanese version

Residents with hearing loss who cannot make reservations by phone, PC, or smartphone may make reservations for mass vaccination venues or health care facilities via fax.

Reservations online (reservation website) (in Japanese)

Yokohama dedicated reservation website
URLhttps://v-yoyaku.jp/141003-yokohama
Hours24 hours/day
User manual

•How to use the dedicated reservation website (vaccinations for young children)(PDF:3,172KB) (in Japanese)

Compatible browsers

Internet Explorer is not supported. Please access the reservation site on newer browser such as Microsoft Edge or Google Chrome.

Cancelling reservations

If you are unable to go to the venue on the day you made a reservation, please be sure to cancel the reservation by the day before. Your cooperation is appreciated to ensure no precious vaccine doses go to waste.

How to cancel reservations(PDF:930KB) (in Japanese)

What to bring on the day you get the vaccine booster

  • Please ensure the parent or guardian will accompany the child. (If this would be difficult, a relative who is familiar with the child’s state of health may accompany the child in place of the parent or guardian. A letter of proxy is not required, but the parent or guardian’s signature is required on the pre-vaccination questionnaire.)
  • If the child receiving the vaccine or their accompanying parent or guardian experiences a fever or otherwise feels unwell, please cancel the reservation and make a new reservation for a different day.
  • Make sure the child wears clothes that allow the doctors to administer the shot in the shoulder or thigh. Children younger than a year old will receive the shot in the thigh, so please pay particular attention when dressing them.
Please bring the following items to the vaccination appointment
Vaccine voucherBring the whole paper with the sticker still attached.

Vaccination questionnaire

Fill it out beforehand and bring it with you.
•In the “phone number” field, provide a number that will reach the parent or guardian during the day.
•In the signature field, the parent or guardian should write their own name.

Personal ID

(of the child getting the vaccine)

Individual Number Card, Residence Card, nursing notebook, etc.

Mother and Child Health Notebook

Please bring the Mother and Child Health Notebook if at all possible, because it shows the child’s vaccination history (to check when the child was vaccinated with which vaccine, and to record the COVID-19 vaccination.)

Medication record book (if you have one)To be checked during the pre-vaccination screening.

Multilingual information about the COVID-19 vaccine

The pre-vaccination questionnaire, guidance, informational leaflet have been translated into 17 languages* on the Ministry of Health, Labour and Welfare website.
*English, Arabic, Simplified Chinese, Traditional Chinese, French, Indonesian, Khmer, Korean, Mongolian, Myanmar, Nepali, Portuguese, Russian, Spanish, Tagalog, Thai, Vietnamese
Ministry of Health, Labour and Welfare website(外部サイト)

Inquiries about vaccinations for young children (ages 5-11)

Residents without a regular physician can call to ask questions or concerns about the vaccination for answers and consultation (operators will provide guidance together with doctors as needed).
*Refer to the clinic where your child is regularly examined before contacting the call center.
For general questions about COVID-19 vaccinations, venues, etc.

Yokohama COVID-19 Vaccine Call Center (vaccinations for young children)
Phone number

0120-045-070
*Select “2” at the prompt for vaccinations for children.

Hours

9 am to 7 pm (including weekends and holidays)

Languages

Japanese, English, Chinese, Korean, Vietnamese, Nepali, Spanish, Portuguese

Precautions

*Many residents have dialed the wrong number. Take care to dial the correct number and double-check the number when redialing.
*This call center does not take reservations.

FAX number050-3588-7191 (for residents with hearing loss)

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