Ryuji Akiyama of Robert Enters His Second Year as “hamon band Campaign Captain”
Mitsufuji has appointed comedian Ryuji Akiyama to continue as the campaign captain for its "hamon band" wearable device series, which visualizes heatstroke risk. In his second year, Akiyama will focus on promoting a deeper understanding of "core body temperature" and alert systems to improve safety in industrial workplaces, coinciding with the launch of the new "hamon band V" model.
📋 Article Processing Timeline
- 📰 Published: March 30, 2026 at 20:11
- 🔍 Collected: March 30, 2026 at 22:56 (2h 44m after Published)
Mitsufuji is launching a new promotion for the "hamon band V," the latest model in its "hamon band" series of wearable devices that visualize heatstroke risk. Following last year's success, the company is once again partnering with Ryuji Akiyama—the comedian, actor, and creator known for his versatile talents—as "Campaign Captain." This year, the initiative will focus on deepening understanding of "core body temperature" and "alerts" to further strengthen safety awareness in the workplace.
Mitsufuji Corporation (Headquarters: Seika-cho, Kyoto; President: Ayumu Mitera; hereinafter "Mitsufuji") has been providing various product developments and wearable IoT solutions under its new corporate slogan, "Creating Safety," introduced this year. As part of this effort, the company is launching a new promotion for the "hamon band" series, once again appointing Ryuji Akiyama as the campaign captain.
In recent years, climate change has made extreme heat the new normal, making heatstroke prevention an urgent issue in industries such as construction and manufacturing. Leveraging its proprietary "algorithm for estimating core body temperature changes," developed in collaboration with the University of Occupational and Environmental Health, Japan, Mitsufuji has been advancing the social implementation of wearable devices that accurately capture the state of the human body.
[Ryuji Akiyama’s Initiatives in His Second Year as Campaign Captain]
Since the campaign began in 2025, Akiyama has served as a "captain protecting the workplace," communicating the importance of heatstroke countermeasures in an easy-to-understand manner. In his second year, he has deepened his knowledge by receiving lectures from Associate Professor Chie Kurosaka of the University of Occupational and Environmental Health, Japan—who co-developed the core body temperature estimation algorithm with Mitsufuji—on the importance of "core body temperature" and "alerts" as key indicators of heatstroke risk. This year, alongside the new "hamon band V" model, he will continue to deliver a correct understanding of extreme heat and safety awareness to more workplaces.
- Ryuji Akiyama x Associate Professor Kurosaka Special Video: "Core Body Temperature Edition"
- Ryuji Akiyama x Associate Professor Kurosaka Special Video: "Alert Edition"
[Comment from Ryuji Akiyama]
Hello everyone, I’m Ryuji Akiyama from Robert. It’s been way too hot these past few years, hasn't it? The Earth is starting to change its attitude. I actually heard from a "representative" of the Earth earlier, and they said, "The Earth is in trouble again this year. It’s going to get hot." My partner during times like these is this "hamon band." It alerts me to the risks of extreme heat that creep up on you before you even notice. How does it do that? It’s the first in the world to feature an algorithm that estimates changes in "core body temperature," which is crucial for determining the severity of heatstroke, based on pulse waves. Well, I learned all of this from Professor Kurosaka at the University of Occupational and Environmental Health, who co-developed this algorithm. Being in my second year as campaign captain, I’ve become incredibly knowledgeable about the "extreme heat scene." The new "hamon band V" model not only notifies you of changes in core body temperature via three signals, but it also includes a clock function, so you can check your status and the time even when you're focused on work. The Earth is getting hot to a level that is no joke. I hope you all survive the extreme heat this year with the "hamon band V."
[About the New "hamon band V" Model]
"hamon band V" is a new model born from feedback from the field, combining heatstroke risk detection and a clock function into a single device. Using a patented algorithm that estimates core body temperature changes from the wearer's pulse waves, it visualizes heatstroke risks that the user might not notice, providing intuitive notifications via LED, vibration, and sound. It features a standalone design that is ready to use as soon as it is turned on. With IP67-rated water and dust resistance and 24-hour battery life, it can be used with peace of mind in any work environment.
- hamon band V Press Release
Mitsufuji Corporation (Headquarters: Seika-cho, Kyoto; President: Ayumu Mitera; hereinafter "Mitsufuji") has been providing various product developments and wearable IoT solutions under its new corporate slogan, "Creating Safety," introduced this year. As part of this effort, the company is launching a new promotion for the "hamon band" series, once again appointing Ryuji Akiyama as the campaign captain.
In recent years, climate change has made extreme heat the new normal, making heatstroke prevention an urgent issue in industries such as construction and manufacturing. Leveraging its proprietary "algorithm for estimating core body temperature changes," developed in collaboration with the University of Occupational and Environmental Health, Japan, Mitsufuji has been advancing the social implementation of wearable devices that accurately capture the state of the human body.
[Ryuji Akiyama’s Initiatives in His Second Year as Campaign Captain]
Since the campaign began in 2025, Akiyama has served as a "captain protecting the workplace," communicating the importance of heatstroke countermeasures in an easy-to-understand manner. In his second year, he has deepened his knowledge by receiving lectures from Associate Professor Chie Kurosaka of the University of Occupational and Environmental Health, Japan—who co-developed the core body temperature estimation algorithm with Mitsufuji—on the importance of "core body temperature" and "alerts" as key indicators of heatstroke risk. This year, alongside the new "hamon band V" model, he will continue to deliver a correct understanding of extreme heat and safety awareness to more workplaces.
- Ryuji Akiyama x Associate Professor Kurosaka Special Video: "Core Body Temperature Edition"
- Ryuji Akiyama x Associate Professor Kurosaka Special Video: "Alert Edition"
[Comment from Ryuji Akiyama]
Hello everyone, I’m Ryuji Akiyama from Robert. It’s been way too hot these past few years, hasn't it? The Earth is starting to change its attitude. I actually heard from a "representative" of the Earth earlier, and they said, "The Earth is in trouble again this year. It’s going to get hot." My partner during times like these is this "hamon band." It alerts me to the risks of extreme heat that creep up on you before you even notice. How does it do that? It’s the first in the world to feature an algorithm that estimates changes in "core body temperature," which is crucial for determining the severity of heatstroke, based on pulse waves. Well, I learned all of this from Professor Kurosaka at the University of Occupational and Environmental Health, who co-developed this algorithm. Being in my second year as campaign captain, I’ve become incredibly knowledgeable about the "extreme heat scene." The new "hamon band V" model not only notifies you of changes in core body temperature via three signals, but it also includes a clock function, so you can check your status and the time even when you're focused on work. The Earth is getting hot to a level that is no joke. I hope you all survive the extreme heat this year with the "hamon band V."
[About the New "hamon band V" Model]
"hamon band V" is a new model born from feedback from the field, combining heatstroke risk detection and a clock function into a single device. Using a patented algorithm that estimates core body temperature changes from the wearer's pulse waves, it visualizes heatstroke risks that the user might not notice, providing intuitive notifications via LED, vibration, and sound. It features a standalone design that is ready to use as soon as it is turned on. With IP67-rated water and dust resistance and 24-hour battery life, it can be used with peace of mind in any work environment.
- hamon band V Press Release