Bashamichi Campus
(Age 2 - Age 3)

Kannai Campus
(Age 4 - Grade 12)

JPN

Come for Adventure at CGK Summer School for Elementary Students!

Jul 17 – Aug 26, 2026

Join us for a fun-filled summer break with activities!
Choose your favorite programs and participate in as little as one day!

CGK International School is an international school with two campuses in Naka-ku, Yokohama, with more than 300 students.
Since its opening, CGK has emphasized inquiry-based learning and is IB PYP World School in our preschool and elementary school.
In this Summer School, students will engage in a variety of fun and educational activities while nurturing their ability of self-expression, critical thinking skills, and spirit of inquiry.
Please join the CGK program with CGK students.

Details of CGK Summer School

  • Age

    Grade 1 to 6 Students

    *Required to have experience of English learning.
    *We assume that students have a basic level of conversational English. If you have any questions or uncertainties, please consult with us in advance.

    Dates

    July 17 – August 26, 2026 (25 Days)

    *You can apply on a daily basis. Please select as many days as you like.
    *However, July 28-29, August 3-4, August 6-7, and August 19-20, 2026 must be booked as two-day sets.
    *Will close as soon as it reaches capacity.

    Location

    CGK International School - Kannai Campus
    (2-25-2 Minaminakadori, Naka-ku, Yokohama)

    *Our school is located inside a building. Please note that we do not have dedicated parking or bicycle parking facilities.

    Regular Day

    10:00 am - 2:00 pm (CGK Students 7,700 yen (Including Tax), Non-CGK Students 8,800 yen (Including Tax))

    *Please enter after 10:00 am and leave by 2:00 pm
    *For current CGK Afterschool students, on the days they normally attend the Regular Course, they may stay until 7:00 pm as usual.

    Field Trip

    10:00 am - 4:00 pm (CGK Students 12,100 yen (Including Tax), Non-CGK Students 13,200 yen (Including Tax))

    *Fees include entrance fee, bus fee, etc. This fee remains the same even if there are changes to the program due to rain or other circumstances.
    *For current CGK Afterschool students, on the days they normally attend the Regular Course, they may stay until 7:00 pm as usual.

  • Morning Extended Care

    From 9:00 to 10:00 am or from 9:30 to 10:00 am
    550 yen/30 minutes (Including Tax)

    *Not available on train field trip days.

    Phone

    045-211-4690

    What to Bring

    Backpack, Lunch, Water bottle, Indoor shoes (Not required on train field trip days), Suica/Pasmo (required on train field trip days), Hat (optional for field trip days), Foldable umbrella (optional for field trip days)

    *Please place your lunch orders directly with the designated lunch provider.(From 690 yen per meal, tax included / Not available on field trip days)
    *Orders must be placed at least one week in advance of your child's attendance date.
    Instructions for ordering will be provided after your application is complete.

    Limit Number of Students a Day

    [Regular Day & Train Field Trip Day] Approximately 45 students
    [Bus Field Trip Day] Approximately 32 students

    How to Apply

    We accept applications through our LINE account. While you can still apply using the old form, registering via LINE allows you to receive daily photos of the lessons.

    *Reservations must be made by 5:00 pm on the business day before.(For Monday bookings, the deadline is 5:00 pm on Friday.) If you submit the form after the deadline, please wait for a confirmation via LINE or phone on the next business day. Your reservation will be confirmed only after you receive our reply.
    *Cancellation up to 7 days in advance: Full refund
    Cancellation within 6 days of the reservation: No refund

2026 CGK Summer School
Program Calendar

7/17
Fri
VS Park
- Bus Field Trip Day

Have a blast with friends—run, laugh, and enjoy every moment together!

Summer School

VS PARK is an interactive activity facility where you can enjoy experiences like being on a game show.
On the first day of Summer School, students will take on 26 exciting activities and enjoy a wide variety of fun experiences to the fullest!
We’ll start the day at CGK before heading by CGK bus to World Porters, where VS PARK awaits. After an unforgettable experience, we’ll make our way back to CGK on foot.
Please bring a packed lunch as students will be eating in World Porters or at the local park.

*We will take the CGK bus from CGK Kannai Campus.
*Students will be engaged in physical activity so please feel free to bring a change of clothes if required.

7/21
Tue
Experiment Day!
with Mr Mhar

Form and test hypotheses by taking part in multiple fun filled experiments!

Summer School

Students will channel their curiosity as they work together with friends to investigate ideas, test possibilities, solve challenges, and discover how different approaches can lead to exciting results. Through collaboration, observation, problem-solving, and experimentation, students will experience the scientific method in a fun and meaningful way, where every question can lead to a new discovery!
Experiments Include: Balloon Rocket Lab, Bridge Builders Station, Mystery Liquids Lab, Paper Airplane Engineering, Color and Light Lab and Inventor Station.

7/22
Wed

Build Your Own
Dream House
with Mr Steven

Let your imagination run free and create your own ideal dream house!

Summer School

Students will explore different styles of homes by looking at examples from Japan, England, and rural France, including houses with large gardens and even a private lake. Inspired by these ideas, they will design and create their own “dream house” either through detailed drawings with labels or by building a model individually or in groups.

7/23
Thu
Mosaic & Culture
Day
with Ms Renae

Discover how art connects people and cultures in our creative Mosaic and Culture day.

Summer School

Through hands-on mosaic making and cultural exploration, students will investigate patterns, symbols, and stories from around the world while creating their own meaningful artwork.

7/24
Fri
Spaghetti and
Marshmallow
Structures
with Mr Huw

What can you make with spaghetti and marshmallows?!

Summer School

Students will use their ingenuity and curiosity to create structures using everyday objects that serve a practical purpose or communicate an idea. We will discuss the form and function of some famous buildings, bridges and statues from Europe after which students will discuss, decide and design original forms of their own! Following this, the students will be given the materials to get started and must work as a team and communicate effectively to create their own building!

7/27
Mon
Desert
Island Escape
with Ms Nina

Work together to escape from a Desert Island!

Summer School

Summer is here and with that our summer school friends are jetting off to paradise! Or so they think… In ‘Desert Island Escape’ our intrepid summer schoolers will be tasked with (you guessed it) escaping a desert island! With only their wits and an enormous amount of cardboard, they must work together to create fantastical inventions that will help them escape, survive or perhaps even thrive on a remote island. This class will focus on teamwork, design and imagination. Without the help of 'technology' our friends will test their innovation and survival skills in a fun and inclusive environment, we look forward to welcoming you!

7/28
Tue
[Two Day Special Course]
The Secret of Balance in Space
Gyroscope Experiment

Exclusive Co-Hosted Event
Private Access at Mitsubishi Minatomirai Industrial Museum

- Bus Field Trip (only Day 1)

CGK’s partnership with Minatomirai Industrial Museum continues with this two day course giving students exclusive access to the Museum.

Summer School

This two-day seasonal lesson, developed in collaboration with Mitsubishi Heavy Industries, is designed to deepen students’ understanding of what happens after rockets deliver objects into space. During the visit to the Mitsubishi Minatomirai Industrial Museum.

On the first day, students will explore the roles of satellites, space probes, and cargo spacecraft, and investigate how these objects maintain their orientation and stability in the weightless environment of space. Through hands-on gyroscopic experiments, they will observe how spinning objects resist falling and maintain direction, building a foundation for understanding how engineers use the gyroscopic effect in real-world space technology.

In addition, the museum also features Sky, Space, Sea, and Land Zones, where students can explore a variety of exciting and inspiring exhibits.
We will conduct fun, interactive quizzes to review everything we learned at the museum to help the students retain that knowledge for our second day of this project.

On the second day, following the museum experience, the second day will focus on consolidating and applying this knowledge through a teacher-led lesson and hands-on engineering project. Students will review key concepts through demonstrations and then design and build a self-stabilizing spinning CD device, incorporating a simple circuit with a motor to bring their design to life. As they build, students will experiment with different weights and materials to explore how mass and balance affect stability. The lesson will culminate in a final design challenge, where students test their creations to see which model can remain upright the longest, encouraging problem-solving, iteration, and a deeper understanding of how scientific principles are applied in engineering.

*Please note that this is a two day course and students MUST attend both days.
*We will take the CGK bus from CGK Kannai Campus on Day 1.

7/29
Wed
7/30
Thu
Paper Weaving Day
with Ms Anjie

Students will explore creativity through a fun paper weaving craft.

Summer School

Using colorful strips of recycled paper, they will learn simple weaving techniques to create their own unique designs.
Add color to your favorite drawings by weaving paper strips through them, and create your own unique patterns!
This hands-on activity helps develop fine motor skills, patience, and an appreciation for patterns and textures.

7/31
Fri
Invention Day

Let your inner inventor run wild and solve a problem with your own original creation!

Summer School

Taking inspiration from the hit TV show Dragons Den (Shark Tank) students will create an invention and then pitch it to the class during presentation time. The more information and detail they can provide the more likely that their invention will receive a pass from the judge!

7/17 Fri
VS Park
- Bus Field Trip Day

Have a blast with friends—run, laugh, and enjoy every moment together!

VS PARK is an interactive activity facility where you can enjoy experiences like being on a game show.
On the first day of Summer School, students will take on 26 exciting activities and enjoy a wide variety of fun experiences to the fullest!
We’ll start the day at CGK before heading by CGK bus to World Porters, where VS PARK awaits. After an unforgettable experience, we’ll make our way back to CGK on foot.
Please bring a packed lunch as students will be eating in World Porters or at the local park.

*We will take the CGK bus from CGK Kannai Campus.
*Students will be engaged in physical activity so please feel free to bring a change of clothes if required.

Summer School

7/21 Tue
Experiment Day!
with Mr Mhar

Form and test hypotheses by taking part in multiple fun filled experiments!

Students will channel their curiosity as they work together with friends to investigate ideas, test possibilities, solve challenges, and discover how different approaches can lead to exciting results. Through collaboration, observation, problem-solving, and experimentation, students will experience the scientific method in a fun and meaningful way, where every question can lead to a new discovery!
Experiments Include: Balloon Rocket Lab, Bridge Builders Station, Mystery Liquids Lab, Paper Airplane Engineering, Color and Light Lab and Inventor Station.

Summer School

7/22 Wed

Build Your Own
Dream House
with Mr Steven

Let your imagination run free and create your own ideal dream house!

Students will explore different styles of homes by looking at examples from Japan, England, and rural France, including houses with large gardens and even a private lake. Inspired by these ideas, they will design and create their own “dream house” either through detailed drawings with labels or by building a model individually or in groups.

Summer School

7/23 Thu
Mosaic & Culture
Day
with Ms Renae

Discover how art connects people and cultures in our creative Mosaic and Culture day.

Through hands-on mosaic making and cultural exploration, students will investigate patterns, symbols, and stories from around the world while creating their own meaningful artwork.

Summer School

7/24 Fri
Spaghetti and
Marshmallow
Structures
with Mr Huw

What can you make with spaghetti and marshmallows?!

Students will use their ingenuity and curiosity to create structures using everyday objects that serve a practical purpose or communicate an idea. We will discuss the form and function of some famous buildings, bridges and statues from Europe after which students will discuss, decide and design original forms of their own! Following this, the students will be given the materials to get started and must work as a team and communicate effectively to create their own building!

Summer School

7/27 Mon
Desert
Island Escape
with Ms Nina

Work together to escape from a Desert Island!

Summer is here and with that our summer school friends are jetting off to paradise! Or so they think… In ‘Desert Island Escape’ our intrepid summer schoolers will be tasked with (you guessed it) escaping a desert island! With only their wits and an enormous amount of cardboard, they must work together to create fantastical inventions that will help them escape, survive or perhaps even thrive on a remote island. This class will focus on teamwork, design and imagination. Without the help of 'technology' our friends will test their innovation and survival skills in a fun and inclusive environment, we look forward to welcoming you!

Summer School

7/28 Tue - 7/29 Wed
[Two Day Special Course]
The Secret of Balance in Space
Gyroscope Experiment

Exclusive Co-Hosted Event
Private Access at Mitsubishi Minatomirai Industrial Museum

- Bus Field Trip (only Day 1)

CGK’s partnership with Minatomirai Industrial Museum continues with this two day course giving students exclusive access to the Museum.

This two-day seasonal lesson, developed in collaboration with Mitsubishi Heavy Industries, is designed to deepen students’ understanding of what happens after rockets deliver objects into space. During the visit to the Mitsubishi Minatomirai Industrial Museum.

On the first day, students will explore the roles of satellites, space probes, and cargo spacecraft, and investigate how these objects maintain their orientation and stability in the weightless environment of space. Through hands-on gyroscopic experiments, they will observe how spinning objects resist falling and maintain direction, building a foundation for understanding how engineers use the gyroscopic effect in real-world space technology.

In addition, the museum also features Sky, Space, Sea, and Land Zones, where students can explore a variety of exciting and inspiring exhibits.
We will conduct fun, interactive quizzes to review everything we learned at the museum to help the students retain that knowledge for our second day of this project.

On the second day, following the museum experience, the second day will focus on consolidating and applying this knowledge through a teacher-led lesson and hands-on engineering project. Students will review key concepts through demonstrations and then design and build a self-stabilizing spinning CD device, incorporating a simple circuit with a motor to bring their design to life. As they build, students will experiment with different weights and materials to explore how mass and balance affect stability. The lesson will culminate in a final design challenge, where students test their creations to see which model can remain upright the longest, encouraging problem-solving, iteration, and a deeper understanding of how scientific principles are applied in engineering.

*Please note that this is a two day course and students MUST attend both days.
*We will take the CGK bus from CGK Kannai Campus on Day 1.

Summer School

7/30 Thu
Paper Weaving Day
with Ms Anjie

Students will explore creativity through a fun paper weaving craft.

Using colorful strips of recycled paper, they will learn simple weaving techniques to create their own unique designs.
Add color to your favorite drawings by weaving paper strips through them, and create your own unique patterns!
This hands-on activity helps develop fine motor skills, patience, and an appreciation for patterns and textures.

Summer School

7/31 Fri
Invention Day

Let your inner inventor run wild and solve a problem with your own original creation!

Taking inspiration from the hit TV show Dragons Den (Shark Tank) students will create an invention and then pitch it to the class during presentation time. The more information and detail they can provide the more likely that their invention will receive a pass from the judge!

Summer School

The August program will be announced soon.

Previous Seasonal Schools

SIGN UP for Seasonal School

Click here to contact us from the old form or phone.
Registering via LINE allows you to receive daily photos of the lessons.

FAQ

Do you provide bus transportation?

No, we do not. We ask that parents/guardians drop off and pick up their children, or the children commute to the school on their own.

Are school lunches provided?

Yes, you can bring your own lunch or order a lunch on Regular Days. Please bring your own on Field Trip Days.

Can I visit the school before I apply?

Yes. You are welcome to observe an actual afterschool classes. Please feel free to contact us.

Is it possible to extend the hours of care?

Pre-extended care (from 9:00 or 9:30 am) is available. No extended care after the end of Seasonal School (2:00 pm for Regular Days and 4:00 pm for Field Trip Days) is available.

Can I apply by the day?

Yes. Seasonal School is available on a per day basis.

Is there a maximum capacity?

Yes. The daily capacity is approximately 45 students for the Regular Days and Train Field Trip Days, and approximately 32 students for Bus Field Trip Days.

Can I find out about my child's lessons after they participate?

We will share photos of how the day went through LINE. Please feel free to contact us if you have any questions about your child's experience.

Is there a reservation deadline?

Yes. The deadline is 5:00 pm on the business day before your desired date. (If your booking is for Monday, the deadline is 5:00 pm on Friday.)
If you submit the form after the deadline, your reservation will only be confirmed once you receive a reply from us via LINE or phone.

Is there a cancellation fee if I need to cancel my reservation?

Up to 7 days before the reserved date
Cancellations made at least 7 days in advance will receive a full refund.

Within 6 days of the reserved date (including the day of use)
Cancellations made within 6 days of the reserved date are non-refundable.

Apply for Seasonal School

We accept applications through our LINE account. While you can still apply using the old form,
registering via LINE allows you to receive daily photos of the lessons.

SIGN UP for Seasonal School

Click here to contact us from the old form or phone.

CONTACT

INQUIRE ON LINE

Click here to contact us from the old form.

LINE
LINE
INQUIRY