November 4th, 2018 Hanamaru Lab awarded regional semifinal prize at the world's biggest EdTech startup competition "GESA"
December 5th, 2018 Calculation card game "Yakusu" nominated for the Google Play Best of 2018 Awards in Japan
April 27th, 2017 Nominated Google Play Awards 2017 Finalist
April 10th, 2017 Google Editor’s Choice for the Play Store (Japan)


Hanamaru Lab is a small startup company based in Tokyo. Launched in 2014 by Kei Kawashima, a professional teaching materials designer
who supervises Sony’s Global Math Challenge.

Since their launch they have developed teaching materials to help improve children's problem solving and critical thinking skills,
with the best selling publication ‘Nazope’, and Google Play Awards Finalist app ‘Think! Think!.

Hanamaru Lab also hold their own weekly experimental class in Tokyo, in partnership with Hanamaru Group, one of Japan's leading
specialized learning schools. They regularly visit countries in Southeast Asia to improve their teaching quality and get feedback on their work.

We have developed our app by visiting many Southeast Asian countries, Philippines, Cambodia, and Laos.
We held classes at elementary schools and orphanages on these countries.


Think! Think!

An educational app to help improve children’s problem solving and critical thinking skills. Nominated Google Play Awards 2017 finalist.
>> learn more



Problem designer for Sony Global Education, Inc.’s online worldwide math competition.

>> learn more


Southeast Asia

Visited and held classes in several Southeast Asian countries including The Philippines, Cambodia, and Laos for more than 5 years. Teaching over 10,000 children has provided feedback, and inspiration for new Think! Think! content.



Managing an experimental class to flourish problem solving and critical thinking skills. Held in Tokyo once a week, each class has 20 children aged 5 - 7.



Published several math drill books called “Nazope”, currently best selling on the Japanese Amazon Store.
>> Amazon Store Japan


Hanamaru Lab 

Tokyo building 6th floor, 3-32-7, Hongo, Bunkyo, Tokyo