Release of Portable Lighting 'JAKOBSSON PORTABLE NIGHT EDITION' to Organize Pre-Sleep Time

YAMAGIWA Corporation (Headquarters: Minato-ku, Tokyo, CEO: Shinya Matsukawa, hereinafter referred to as YAMAGIWA), which deals in original lighting and the import and sale of global lighting and furniture brands, will begin selling the portable lighting 'JAKOBSSON PORTABLE NIGHT EDITION,' which focuses on the transition between on and off before bedtime, starting June 15, 2026 (Monday) at the YAMAGIWA official online store in a limited edition of 50 units. The 'JAKOBSSON LAMP' is a revival series of a masterpiece lighting designed by Hans-Agne Jakobsson, a representative lighting designer from Sweden, in 1957. This model, 'JAKOBSSON PORTABLE NIGHT EDITION,' is a portable lighting that gently organizes the time before bed with a lighting environment inspired by the rhythm of light in nature. Recently, due to changes in work styles and the advancement of information environments, it has been pointed out that even outside of working hours, thoughts tend to linger on work. In particular, business professionals who frequently engage in judgment and decision-making tend to continue thinking even before bedtime, making the transition to mental and physical rest a challenge. This product proposes a time for transitioning to rest naturally, creating an environment where the tension of the day naturally subsides with light. Product Features '1/f flickering light' that resonates with the warmth of pine wood The ambient mode light installed has a gentle flickering rhythm like sunlight filtering through trees or flames, gradually dimming and automatically turning off after about 15 minutes. The soft light that flickers through the thin pine seed gently releases the day's tension and creates a margin that guides the heart towards sleep. 2400K warm light that accompanies relaxation time Adopts amber light at 2400K that suppresses blue light. The calm light color that is less stimulating to the brain gently illuminates the wood grain, creating an environment where the mind and body relax. A comfortable flow from the living room to the bedroom Cordless and lightweight, it gently accompanies the flow of life without being tied to the power source location. In the living room, it illuminates the relaxation time with normal lighting, and in the bedroom, it can calm the mind with a quiet brightness by switching to ambient mode. Product Information Product Name: JAKOBSSON PORTABLE NIGHT EDITION Price: 69,630 yen (tax included) Size: H248mm × φ150mm Base φ113mm Weight: 0.4kg Light Source: Built-in LED 1.1W (2400K, bulb color) Power Consumption: 2.3W ・ Step dimming (100% - 50% - 25% - 5%) ・ Ambient mode equipped (bedtime environment performance mode) * Detailed specifications can be viewed from the product page below This will be a limited edition of 50 units sold at the YAMAGIWA official online store. Sales Page URL: https://shopping.yamagiwa.co.jp/products/323s7612 Reference Information ①: Survey on 'Modern People's Nighttime Behavior and Awareness of Rest' We conducted a survey to understand the reality of 'brain switching' before bedtime among modern business professionals (especially decision-makers) and the changing awareness of investment in improving sleep quality. The results showed the following trends regarding the state before bedtime. ・ About 20% of decision-makers drag work thoughts for more than an hour About 20% of business professionals involved in business judgment and decision-making responded that it takes 'more than an hour' to switch from work mode to rest mode before bedtime. Looking at this trend by the frequency of business judgment and decision-making, it was found that the higher the layer with more judgment and responsibility, the higher the proportion that takes time to switch before bedtime. Even at bedtime, the state of not being able to get out of work thoughts continues, and the reality that the 'switch to rest' before falling asleep is not going well has emerged. ・ The main factor hindering the switch is 'thoughts related to work' The most common factors hindering the switch were 'work-related anxieties and concerns (58.0%)' and 'preparation for the next day's tasks (46.8%)'. On the other hand, information stimuli such as smartphones and news were low at 17.7%, and the reality that thoughts related to work that continue until bedtime affect sleep has emerged. ・ About 80% feel challenges in sleep quality About 80% have some concerns about sleep quality, and many issues related to recovery, such as 'waking up easily in the middle of the night' and 'feeling tired even after sleeping', were observed. ・ About 2 out of 3 people have positive expectations for light that replicates natural rhythms Regarding lighting that replicates the rhythm of light like 'sunset' or 'campfire' in nature, about 2 out of 3 people responded that they 'think the quality of falling asleep will improve'. Survey Method: Internet Survey Survey Target: Modern business professionals residing in Japan Valid Responses: n=2,145 Survey Period: April 2, 2026 ~ April 5, 2026 Survey Entity: YAMAGIWA Corporation Reference Information ②: Verification Experiment Data Focusing on the transition to a quiet state before falling asleep (changes in body movement), we conducted a comparative verification with a small number of participants with the cooperation of Professor Yamauchi Yasuki of Yamagata University. As a result, a certain trend was confirmed regarding the transition to a relaxed state due to the difference in lighting environment. ・ Changes in the transition to a quiet state after getting into bed When comparing the use of ambient mode and the time of turning off the lights (completely dark), it was found that in 83% of the subjects, the body movement after getting into bed settled down more quickly. ・ Changes in the time until reaching a quiet state On average, it was confirmed that the time until the body movement settles down is about 34% shorter when using the ambient mode. This suggests that the difference in the environment due to lighting may have a certain impact on smooth switching to rest. *Note: This data is the result of comparing the time from getting into bed to when the body's movement settles down, measured with a body movement sheet. *Note: This product is a lighting fixture and does not guarantee falling asleep. Experiment Design and Analysis Cooperation: Professor Yasuki Yamauchi, Yamagata University Subjects: 6 men and women in their 20s Measurement Method: Changes in body movement after getting into bed using a body movement sheet Comparison Conditions: ① Using ambient mode ② Turning off the lights Period: Each condition was measured for 3 days, and the average values were compared Comments from Professor Yasuki Yamauchi, Yamagata University It has been known from previous research that 1/f flickering leads to comfort and relaxation. In this comparative experiment, data was obtained showing that such differences in lighting environment have a certain relationship with the way body movement settles down after getting into bed. This result provides interesting insights into considering the relationship between lighting environment and changes in state after getting into bed. In the future, it is important to further examine this relationship in more diverse conditions and subject layers and pursue the possibilities of a 'high-quality rest environment' brought about by light. Profile of Yasuki Yamauchi Professor, Graduate School of Engineering, Yamagata University, Department of Information and Electronics, Yamagata University Specialized Field: Color Science and Visual Science / Lighting Engineering and Lighting