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Complete the Maekawa architecture in Kanagawa Prefecture on a tour of the Prefectural Youth Center!

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File.21 Studying Maekawa Architecture at Prefectural Youth Center
Miyuki Inoue (Magcal Editorial Department)

Buildings designed by Kunio Maekawa, the flag bearer of postwar modernism architecture in Japan, are gathered in the Koyogaoka area of Yokohama. The prefectural library and the prefectural music hall were already guided by the tour, so the only youth center remains.
This time, in addition to the “Tamamono Tour” by the volunteer group bridge, I heard that there was also a “Stage Backyard Tour” by the hall staff and a lecture by Director Hashimoto of the Maekawa Architectural Design Office. saw.

The prefectural youth center was completed in 1962. It was originally a 5-story complex with a theater hall, a planetarium and a science exhibition hall. After that, large-scale renovation work was carried out for the purpose of functional improvement and earthquake resistance. It was reborn in 2005 as the current shape.
This major renovation received the 19th BELCA Award for Best Reform as an excellent example of extending the life of public facilities. In 2018, DOCOMOMO JAPAN was selected as a modern movement architecture in Japan, following the prefectural library and the music hall.

* Click here for the tour report of the prefectural concert hall
* Report of the architectural tour of the prefectural library "> here >>>

The library and the music hall are masterpieces of the first Maekawa Architecture. On the other hand, the Youth Center was designed during the transition period from Phase 2 to Phase 3, so it seems interesting that it has both features.
One of the features is "precast concrete" used for window frames. Concrete plates are made in the factory in advance and assembled on site.

Another feature is “driving tiles”. The outer wall of the concrete is exposed to surface deterioration, so it is said that it aims to improve durability and design by covering it with large tiles. It can be seen close up around the entrance of the hall on the back side of the hall.
By the way, each tile weighs about 10kg (!). I hear a lot about the anecdote that it was unpopular with the craftsmen.

The major renovation in 2005 was to improve the seismic performance while preserving and maintaining the appearance as much as possible. For this purpose, the planetarium, observatory, and floor slabs on the 4th floor were removed to reduce the weight of the building and install seismic walls. It was transformed into a solid and sturdy three-story building.
CurrentWhen you look up on the 3rd floor, you will notice that there is a mysterious space on the ceiling. This seems to be a trace of the removal of the 4th floor slab.

Traces of major renovations can also be seen on the stairs leading from the first floor lobby to the second floor. Do you see that the “driving tiles” used for the outer wall remain on the left-hand 2nd floor wall? Yes, this is an expanded area, once an outdoor space. Before the renovation, we used an external staircase to the 2nd floor, so we expanded the building for convenience, and set up a new dedicated staircase.

Speaking of youth center, Koyozaka Hall!
This was also a major renovation in 2005, with a major renewal except for the walls. Of course, sound, lighting, and other stage equipment have been renewed, but renewal of the book has also been a major issue.
The book is by a Japanese painter, Nei Sugiyama. Although it is a valuable item that has only a few left in Japan, it cannot be denied that it has deteriorated over time. So, after carefully examining the original paddle, we searched for the original color, and, like the last time, we asked a workshop in Kyoto, which has a very rare yarn binding weaving. A wonderful revival was achieved.
By the way, a part of the original book is decorated in the lobby, so you can see it when you visit the youth center.

The wall surface of the hall remains the same as before, but in fact, it is packed with amazing ideas.
It is a structure called “Helmholtz Resonator”, and there is a space for sound absorption on the back side of the tile, controlling the sound of the whole hall. The reverberation time is 1.8 seconds, which is slightly longer than the music hall. I thought it was just a design (sorry), so I was surprised when I was doing something physically amazing!

In addition to the guidance of everyone at bridge, this report was also referred to the lecture by Director Hashimoto of Maekawa Architectural Design Office.
Thank you very much!

Finally one more point.
This year, the open space in front of the Youth Center has been improved and it has become a pleasant space. The ridge towering in the center seems to be the same tree that was drawn in the Ukiyo-e when the Kanagawa congregation was set up on this land, and is now a symbol of Koyogaoka.
Mr. Maekawa cherishes the space to approach the building,There was also a facility that designed a space called the At the time of designing the Koyogaoka area, there seems to be no evidence of using the name, but Director Hashimoto believes that the newly-developed space is appropriate to call <esplanade>.

    The Prefectural Youth Center is a facility that promotes the sound development of youth and contributes to the improvement of the culture of citizens of the prefecture. Is working on.
    1. Development of human resources to promote youth learning
    2. Response to youth withdrawal, school refusal and delinquency
    3.Promotion support for youth scientific experience activities
    4. Support for youth and prefectural performing arts activities

    • Address
      9-1, Koyogaoka, Nishi-ku, Yokohama, Kanagawa Prefecture
    • TEL
    • Business Hour
      * Koyozaka Hall, Studio HIKARI, Practice room (except reception desk) 9: 00-22: 00 * Drama material room 9: 00-22: 00 * Youth material room 9: 00-17: 00 * Youth Support Plaza 9 : 00-21: 00 (until 17:00 on Sundays) [Closed] New Year's holiday (12 / 28-1 / 4) * However, the Youth Support Plaza, Youth Library, and Theater Library are closed every Monday. .