日立市立日高小学丨株式会社 三上建筑事务所

Cubic School IV

Release Time: December 9, 2021


Project Name: Hitachi City Hidaka Elementary School


Project location: 2-12-1, Hidaka-cho, Hitachi City, Ibaraki, Japan


Gross Built Area: 2,519.20㎡


Main structure:RC+S


Completion Year: January 2021


Design Team: MIKAMI Architects


Lead Architects: Kazuhiko Mashiko


Engineering: Kanebako Structural Engineers


Photo credits: Koji Horiuchi


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As a renovation project for the Hidaka Elementary School building, we defined the design concept of the school as "a school that nurtures children's dreams for the future". It will serve as a symbol of Hitachi City, evoking the children's aspirations for the future and their desire to learn. The outward expression part of the school building brings a sense of movement and a variety of expressions depending on the perspective.

Side view of the school building©MIKAMI Architects

Front entrance©MIKAMI Architects


The existing school building is located on the south side of the site, and the playground is on the north side. The challenges were to keep classes at the existing school in session while constructing the new building and give careful consideration to the residents of the neighboring area on the north side. In addition, use of the pool and gymnasium had to remain unencumbered.

Layout Diagram©MIKAMI Architects

Rear view of the school building©MIKAMI Architects


To achieve these needs, the new building was designed as a rectangular shape on a north-south axis, adjacent to the existing gymnasium, without interfering with the existing classrooms and playground. The new building is surrounded by a parking lot and a plaza for the future gymnasium, and the overall layout encloses the new building in the center of the campus. The aim is to reduce the noise and the impact on the surrounding residential areas by using these peripheral facilities as a buffer zone, and to reduce the impact on the oppressiveness and sunlight.

Exterior of compact academic building©MIKAMI Architects


As Japanese school buildings have always been light-focused, the buildings are usually long and slender, located in an east-west direction. Our rectangular school building itself occupies is small. Moreover, there are advantages to the short internal movement distance and the small size of the outer wall. This creates classrooms on the opposite side, that do not face the south side, where it becomes necessary to devise ways to ensure natural lighting and ventilation. We solved the drawbacks, such as the increase in heat load in summer on the south side of the classrooms and the direct sunlight in winter, and ensured lighting ventilation with two courtyards and implemented a rectangular school building.

Open-air atrium©MIKAMI Architects


In the center of the new building, there is a "Hidaka Hall & Media Center" for children to interact with each other, and there are general classroom areas, functional classroom areas, management office areas, special support classrooms, health care rooms, and school nursery classes around it.

Multifunctional hall©MIKAMI Architects

Library room©MIKAMI Architects

Lunch room©MIKAMI Architects

General classroom(for 6-year students)©MIKAMI Architects

PC room©MIKAMI Architects

English classroom©MIKAMI Architects

Laboratory©MIKAMI Architects

School infirmary©MIKAMI Architects

School childcare room©MIKAMI Architects

Home economics classroom©MIKAMI Architects

Public space between classrooms©MIKAMI Architects



The new school building is a reinforced concrete plus partial steel frame structure. In principle, the structure is composed of a curtain wall and deck. The wall of flat pillars contains an earthquake-resistant wall and the deck of flat beams contains voided slabs.

The seismic wall as a seismic element will not only control the deformation of the building during an earthquake to ensure the safe evacuation of people inside, but also maintain the safety of the building after the earthquake to achieve the possibility of continuous use. The hollow floor slab is also conducive to the non-interference of electrical wires and other built-in equipment, and can save the floor spacing, creating a wider space by increasing the clear height of the floor.

Shaft stairway©MIKAMI Architects


The wall that runs through the outer peripheral surface is an independent curtain wall that gives an unobstructed line of sight to the courtyard. The structure forms the framework of the building with the expression of intent kept to a minimum.

Hidaka Elementary School at night©MIKAMI Architects

Floor plan 1-3F©MIKAMI Architects

East-west cross-section©MIKAMI Architects

Space structure diagram©MIKAMI Architects

# Courtyard with a sense of nature # Cherish the common space # Fully-functional classrooms

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