

2025.09.04-09.08 Yonglin Ke + Masashi Kurobe The nights in Honolulu are a diverse blend of resort illumination, residential lights, torches, and night market glows. However, as the city develops, the starry sky is fading, raising concerns about the impact on the local ecosystem. Balancing urban growth with light pollution countermeasures remains a significant challenge. We conducted an on-site night walk survey to explore the balance between the city and nature and to evaluate the current lighting environment. ■Honolulu Honolulu, the capital of the U.S. state of Hawaii, is a prominent tourist destination in the heart of the Pacific Ocean. Simultaneously, it serves as the political and economic hub of the state. In this land where the sea, mountains, and urban areas sit in close proximity, the nightscape reveals a variety of expressions depending on the time and location—blending the glow of resort hotels, the soft lights of residences, traditional fire torches, and the vibrant lights of night markets. Furthermore, the combination of intense sunlight and a tropical climate creates a unique character within the city’s lighting environment. On the other hand, urban development and the growth of the tourism industry have negatively impacted the visibility of the starry sky and affected local ecosystems, such as migratory birds and sea turtles. While the state and city have begun implementing measures to reduce light pollution, finding a balance with the tourism industry remains a challenge. During this night walk survey, we investigated…
In the middle of Tokyo is the Imperial Palace, a haven for runners and tourists, alike. The lighting in the palace outer garden and nearby Wadakura Fountain Park has been renewed and replaced with environmentally conscious LED fixtures. We surveyed the unique pocket of darkness that surrounds the Imperial Palace along with lighting environment of nearby parks and roads. Imperial Palace Outer Garden. The fancy pole lights in the outer garden are originally gas lamps, but the light source has been changed to high-pressure sodium lamps and now upgraded to LEDs. The average lux level is only 1-2lux along the paths lined with these LED fixtures, but inside the fixtures are 6, 26watt LED modules all pointed in different directions. This application helps to spread the light around without making a too bright, but comfortably dim atmosphere. Daikancho Street Daikancho Street runs along the north side of the palace grounds, is a much narrower street and pedestrian sidewalk compared with the rest of the facilities surrounding the palace. Along the tidy, hedged sidewalk, streetlights are placed at 3-meter intervals. Mostly for crime prevention, the lights are very bright and glaring. Ohtemachi Entrance The Ohtemachi Entrance area leads to an inner palace garden and is surrounded by a main arterial road on the outside, for a very open and accessible area. Most lighting is road lighting, mounted on 10-meter tall poles arranged down the middle of the street, but plenty bright…
2022.10.27 Genki Watanabe+ Chuanyi Liu+ Yuki Ito This Tokyo night walk survey took place in Shimokitazawa, a neighborhood especially popular among young people. Known as one of Tokyo’s most culturally rich districts, the area is filled with vintage clothing shops, eateries, theaters, niche cinemas, and art galleries.The Lighting Detectives previously conducted a survey here in 2009. This time, we examined how the area has changed since the Odakyu Line was relocated underground. We also focused on the newly developed Shimokita Senrogai area, which opened on May 28, 2022, assessing its lighting design and comparing it with the older shopping streets to explore the contrast between new and traditional urban atmospheres. ■Map around Shimokitazawa Station With the Odakyu Line moved underground, a new neighborhood called Shimokita Senrogai was developed between Higashi-Kitazawa Station and Setagaya-Daita Station. Driven by the desire to support the community, redevelopment progressed step-by-step while listening to local residents’ voices. The entire area officially opened on May 28, 2022.Alongside the railway line, new facilities such as daycare centers, a hot spring inn, commercial spaces, student dormitories, and event venues were established. ■Development of Shimokita Senrogai The Shimokita Senrogai area we surveyed is a newly developed space created by moving the Odakyu Line underground. It was designed with the intention of reconnecting the northern and southern parts of the neighborhood that had previously been divided by the railway tracks, resulting in developments that encourage smooth pedestrian circulation throughout. The development features…
From up above Tokyo looks like an overturn jewelry box, the night streets glitter with lights and it a fairly beautiful sight. Once back on ground, the glitter has turned harsh. It is an economically advanced nightscape, an efficient nightscape with needless light and light pollution. An aerial view of Tokyo at night. The dark area in the center of Tokyo, the Emperor`s Palace, is surrounded by clusters of lights that resemble precious stones. From this view it is unclear where Tokyo begins or ends. The Tokyo nightscape is illuminated in bright white light. Mercury lamps and florescent lights in the background of Tokyo Tower control the nightscape of this city. Old-fashioned houseboats gather in the foreground of the Odaiba District and the Rainbow Bridge.
Shimokitazawa is a neighborhood of small shopping streets and alleyways, projecting a strange, but comfortable atmosphere, as people crowd the backstreets until late in the night. However, plans to replace this quaint neighborhood with arterial roads and high-rises are underway. The detectives took what maybe a last chance to survey this area before it is “defaced.” The top half and rooftops of most buildings do not have any luminous signage. As a result, a bird’s eye view of this neighborhood is actually fairly dark. The station front plaza is filled with people listening to music from sidewalk acts or looking at street art. The crowds of people naturally overflow into a nearby street. If an arterial road is planned for this area, this atmosphere will be lost forever. Two streets back-to-back, but built to two different scales and with two different demeanors. On the left is Shimokitazawa`s main south entrance shopping street. With many interior decor shops, the lighting is bright and color temperature is high. One street inside and the atmosphere and lighting are more relaxed. Low color temperature, incandescent lamps from restaurants, cafes, and bars are the main source of light.

