CHIeru Co., Ltd. (Headquarters: Shinagawa-ku, Tokyo; President & Representative Director: Mutsumi Kawai), a provider of ICT solutions for school education, announced that from April 2026 it will add an edge cache function to Tbridge® 300, the entry model of its Tbridge® series of wireless network visualization and stabilization solutions. With this addition, the edge cache function is now available on every model CHIeru offers.
Background: Digital Textbooks Are Becoming Official Textbooks
On April 7, 2026, the Government of Japan approved a bill amending the School Education Act to position digital textbooks as official textbooks. Until now, digital textbooks have been treated as “special teaching materials that can substitute for paper textbooks.” If the bill is enacted, digital textbooks are expected to go through textbook screening in FY2028 and come into use as official textbooks in schools nationwide as early as FY2030.
As digital textbooks spread, school networks will be required more than ever to handle simultaneous access from one-to-one devices and to provide stable connectivity. Small schools with few students in particular have often found that products designed for larger schools are not cost-effective, which has been a barrier to adoption. To address these challenges, CHIeru decided to add the edge cache function to Tbridge® 300.
About Tbridge®
Tbridge® is a wireless network visualization and stabilization solution that has been adopted by more than 2,400 schools (as of March 2026). In school and corporate Wi-Fi environments, it visualizes the status of access points and communication quality in real time and improves connection stability.
In Japanese schools, where one-to-one devices have been deployed under the GIGA School Program, large numbers of devices communicate at the same time during lessons, making network congestion and latency serious problems. Tbridge® delivers stable communication even in these environments and optimizes the network.
Three models are currently available—Tbridge® 300 (for small schools), Tbridge® 500 (for mid-size schools), and Tbridge® 1000 (for large schools)—so schools can choose the best model for their size and usage.
Figure: Guide to choosing a Tbridge® model
Effect of the Edge Cache Function
The edge cache function is especially effective in environments where the same content—such as digital textbook content and OS update data—is used by many devices in a class. By temporarily storing content data inside Tbridge®, it significantly reduces the load on the school’s internet connection.
The higher-end Tbridge® 500 and Tbridge® 1000 already offer the edge cache function, which has delivered results in many schools. By adding the same function to the entry model Tbridge® 300, CHIeru will strengthen its offering for small schools.
Figure: Effect of the edge cache function (network speed on school days at Elementary School A)
Availability
Available from April 2026.
For details, please contact us through the CHIeru website.
Tbridge® product page: https://www.chieru.com/products/system/tbridge-english/