Spurred by the energy crisis post-Fukushima, there’s been a notable increase in the number of mid-rise office and retail buildings with green walls. In an over-built city, vertical surfaces are the largest potential area for gardening, farming, and habitat creation.
Tokyo has far more vertical surfaces than roof areas, and we are only at the very beginning of creating an urban forest.
I have been following this topic for a while, and have watched this idea spread from notable public spaces like Suginami’s ward office (world’s largest green curtain) to apartment balconies, flower shops, and now commercial and retail spaces. This wide distribution across Tokyo and across building types is very exciting to see.
Some questions I have include:
- What types of plants can be grown vertically and for what functions: aesthetics, habitat, scent, seasonal change, food?
- How can green walls enhance innovative architecture and place-making?
- How can vertical and roof gardens connect buildings, neighbors, and wildlife?
- What is the impact on heat island effect, global competitiveness, and quality of life?
The answers will come from experimentation and diffusion. The photos, from top to bottom, are four green walls I’ve recently seen:
1. Hasegawa Green Building in Shiba Koen
2. Office mid-rise in Shinjuku Gyoen-mae (2 photos). The company that created and maintains this green wall is called Ishikatsu Exterior (石勝イクステリア).
3. Oimachi retail building near station.
4. Daimon office building.
A friend told me to check out this green “bus stop” between Kabukicho and Hanazono Shrine. This incredible vine providing shade for the sidewalk is no longer a bus stop, but is in front of Shinjuku’s ward office. As I’ve written before, the wards seem to be leading Tokyo Metropolitan Government and the national government in creating innovative green spaces on their properties.
What’s great about this sidewalk awning is that it requires minimal space and maintenance, yet impacts thousands of people coming to the ward office, or just passing by on this busy street. Two very kind city workers involved with green space took time out to talk with me about the sidewalk, facade, and roof greening.
The sidewalk awning is a combination of two hardy vines: nozenzakura (ノウゼンカズラ in Japanese or Campsis grandiflora in Latin) with orange flowers, which I have seen in my neighborhood blooming all summer.
The other vine is akebi (アケビ, also called Akebia in English), which flowers and fruits. Wikipedia says that it is frequently mentioned in Japanese literature and evokes images of pastoral landscapes; it’s also considered an invasive in New Zealand and parts of the United States. Here in the heart of Shinjuku, it’s a very attractive shade plant with the added bonus of having distinct seasons.
It was nice to see that parts of the facade have vertical plantings, although a simple full facade retrofit would modernize and make more attractive the 1960s building.
The city workers also showed off the roof garden, which has different areas including edibles, herbs, and water plants. It was sad that most of the usage seems to be a place for smokers to congregate. I wonder how they can make the space more attractive for non-smoking workers and neighbors.
It would be cool to see a complete redesign of the entire usable surface of the ward office to eliminate the dead space. Too much of the facade is monotonous concrete with minimal pattern, and too much of the plaza in front and along the side is hard surfaces. A redesign could capture the imagination of residents, retailers, and office owners.