Mitsufuji

What Mitsufuji does

Mitsufuji Corporation (ミツフジ株式会社) is a Kyoto-headquartered, privately held Japanese company founded in 1956 that has evolved from a textile manufacturer into a wearable IoT and smart-fabric specialist. Its core technology stack combines AGposs®, a proprietary silver-plated conductive fiber developed using traditional Nishijin-ori weaving techniques, with a patent-protected algorithm that estimates changes in core (deep) body temperature from pulse wave data alone — characterized as the world's first such method. The company monetizes this stack through two main hardware families: the hamon® smart textile garment line and the hamon band series of wristband/smartwatch devices (hamon band S, V, N, and the high-end MITSUFUJI 03), supplemented by a cloud management platform (hamon CLOUD SERVICE), co-developed variants (iBRA with Wacoal, cocolin with Kimura Tan), and AGposs® material sales to third-party manufacturers.

The company sells primarily via direct B2B enterprise sales targeting construction, manufacturing, food, aviation, and government/education customers in Japan, with supplementary direct-to-consumer e-commerce through mitsufujishop.jp. LTE-enabled models (hamon band N, MITSUFUJI 03) bundle 2-year subscription contracts that include communication and system management fees, creating a recurring revenue layer on top of hardware sales. The MITSUFUJI 03 and hamon band N are registered under NETIS (KT-250012-A), qualifying them for Japanese public construction procurement at a moment when mandatory heatstroke prevention regulations (effective June 2025) are reshaping enterprise safety purchasing. The company has additionally secured defense-sector contracts from Asia and Europe following showcases at the Vietnam Defense Expo, positioning electromagnetic shielding applications of AGposs® within Japan's Defense Buildup Program launched December 2022.

Mitsufuji has raised approximately $29 million in disclosed equity funding, most recently a 2017 round led by a syndicate including Bank of Kyoto, Dentsu, Kaji Group, Maeda, Mitsubishi UFJ Capital, and Nanto Bank. The firm operates with 11-50 employees from its Keihanna Science City headquarters and a Fukushima Center, and is led by founder, president, and CEO Ayumu Mitera. Intellectual property spans patented algorithms across Japan, China, and the EU, complemented by media reach through Nihon TV, Yomiuri Shimbun, and a recurring campaign with comedian Robert Ak.

Name

Mitsufuji

Legal name

ミツフジ株式会社 (MITSUFUJI CORPORATION)

Website

https://mitsufuji.co.jp

Company type

Private

Founded year

1956

Operating status

Operating

Headcount range

11–50 employees

Short description

Mitsufuji Corporation is a Kyoto-based wearable IoT company that builds AGposs® silver-plated conductive fiber garments and the hamon band device series, using a proprietary pulse-wave algorithm to estimate core body temperature for heatstroke prevention in Japanese construction, manufacturing, and industrial safety markets.

Ownership category

akta.pro rank

Product category

Industrial Wearable IoT Devices

NAICS

Other Measuring and Controlling Device Manufacturing (334519), Electromedical and Electrotherapeutic Apparatus Manufacturing (334510)

SIC

Measuring & Controlling Devices, Nec (3829), Electromedical & Electrotherapeutic Apparatus (3845)

akta.pro primary industry

Heat Stress & Thermal Exposure Monitoring (WBGT, Cold Stress) (EUAHAGAD)

Keywords

• Conductive fiber
• Wearable IoT devices
• Smart textile wearables
• Heatstroke prevention
• Vital sign monitoring

Headquarters

HQ city

Kyoto

HQ country

Japan

HQ region

Asia

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Technology or R&D, Personnel, Supply Chain, Operations, Marketing or Sales, Infrastructure

Revenue model

1. Wearable Device Sales (hamon band series): Sale of wearable hardware devices (smart bands and smartwatches) to enterprise customers. Models range from standalone alert-only bands to cloud-connected LTE devices. Revenue recognized upon device delivery, with contract terms of 2 years for some models.
2. System Management / Communication Fees: Monthly communication fees and system management fees included in product pricing (e.g., 71,500 yen retail price includes communication and system management costs). LTE e-SIM enabled devices transmit data to cloud platforms for centralized management.
3. Cloud Data Management Service (hamon cloud): Cloud-based platform for centralized worker health monitoring, real-time risk alerts, data analysis, and management report generation. Offered as part of LTE device packages (hamon band N, MITSUFUJI 03).
4. AGposs® Material Products: Sale of silver-plated conductive fiber materials to third-party manufacturers for integration into various smart textile products. Materials used in electromagnetic shielding and wearable applications.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels6 records

Core offering

Mitsufuji manufactures and sells wearable IoT devices (the hamon band series and hamon® smart textile garments) and silver-plated conductive fiber material (AGposs®) for real-time heatstroke risk detection and vital sign monitoring of industrial workers. The company's patented pulse wave analysis algorithm estimates core (deep) body temperature changes without invasive measurement, and is bundled across standalone wristbands, LTE cloud-connected smartwatches, and textile-integrated garments deployed to construction, manufacturing, food, aviation, and government customers.

Product overview

MITSUFUJI（ミツフジ）は、銀めっき導電性繊維"AGposs®"と脈波解析アルゴリズムをコア技術とするウェアラブルIoTソリューション企業。主要製品は「hamon®」シリーズ{"着るウェアラブル"（AGposs®搭載スマートテキスタイル）と「hamon band」{"シリーズ（ список/スマートウォッチ型リストバンド）"}の2つの柱構成。hamon bandシリーズには4つのモデルがある：エントリーモデルのhamon band S（通信不要·本人通知のみ）、スタンダードモデルのhamon band V（Sに時計表示を追加）、アドバンスドモデルのhamon band N（e-SIM·クラウド連携·遠隔監視）、ハイエンドモデルのMITSUFUJI 03（猛暑リスク＋ストレス·集中度·コンディショニング＋GPS·SOS·転倒検知）。全モデル共通で着用者の脈波から深部体温上昇を推定する世界初の特許アルゴリズム（特許第7175473号）を搭載。MITSUFUJI 03希望小売価格71,500円、hamon band N希望小売価格49,500円（いずれも税込）。

Differentiator

Problem solved

Functional benefit

Brands

• hamon: Smart textile product line using AGposs® silver-plated conductive fiber, integrated into wearable garments for vital sign monitoring including core body temperature, stress, and conditioning.
• hamon band
• AGposs
• iBRA
• cocolin

Products and services

• hamon band S Standalone (communication-free) wristband worn by industrial workers that uses Mitsufuji's patented pulse wave algorithm to estimate core body temperature changes and alert the wearer to heatstroke risk via LED, vibration, and sound alerts. IP67 rated for harsh sites.
• hamon band V Standard standalone wristband adding a clock display to the hamon band S base functionality, with BLE-based automatic time synchronization via the dedicated 03Connect mobile app. Alerts users to heatstroke risk through sound, light, and vibration. IP67 rated.
• hamon band N Advanced LTE wristband with built-in e-SIM that transmits vital signs (heart rate, estimated core body temperature, step count, activity, GPS) directly to the hamon cloud for centralized real-time management of multiple workers by safety supervisors. Includes SOS transmission. NETIS-registered (KT-250012-A). IP67 rated.
• MITSUFUJI 03 High-end smartwatch and flagship LTE cloud-connected model for industrial worker safety, providing heatstroke risk detection plus stress, concentration, and conditioning visualization, along with fall detection, GPS, SOS transmission, and attendance management. e-SIM links directly to the hamon cloud for centralized worker health management. NETIS-registered (KT-250012-A). Sold under a 2-year contract that bundles communication fees, system management, and a free app.
• hamon® Smart Textile Wearable Smart textile garment platform that integrates AGposs® silver-plated conductive fiber as a built-in sensor, capturing continuous accurate pulse waveforms simply by being worn. The proprietary HRV-based algorithm enables real-time visualization of heatstroke risk, stress, and conditioning. Customizable for specific customer needs, with co-developed variants including iBRA (with Wacoal) and cocolin (with Kimura Tan).
• AGposs® Silver-plated Conductive Fiber Mitsufuji's proprietary silver-plated conductive fiber material, manufactured by applying a silver coating to a nylon core using techniques inherited from traditional Nishijin-ori textile weaving. Provides high electrical conductivity combined with flexibility, processability, elasticity, and JIS-compliant wash durability. Sold to third-party manufacturers for smart textile integration, electromagnetic shielding, cleanroom, and precision electronics applications, and used internally as the sensor substrate for hamon® garments.

Quantifiable outcome

• Core body temperature (deep body temperature) estimated in real time from pulse wave alone, without requiring rectal or invasive measurements
• +2 more outcomes

Named customers6 records

Segments5 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration3 records

AI capability5 records

Feature3 records

Partnerships

Five partnerships are on record, tiered minor, core and flagship.

• Defense Innovation Science and Technology Institute (DISTI)minorStrategic or Co-development Partner · 1 December 2022Mitsufuji Corporation (Kyoto) secured new defense contracts from Asia and Europe after showcasing electromagnetic shielding prototypes at the Vietnam Defense Expo, following Japan's Defense Buildup Program launch in December 2022 to foster dual-use technology development for the Self-Defense Forces.
• School of Medicine, University of Occupational and Environmental Health (Japan) (学校法人産業医科大学)coreStrategic or Co-development PartnerJoint research partner for development of core body temperature estimation algorithm from pulse wave. Three-year research program involving approximately 70 participants collecting data in actual hot work environments. Academic partnership provides medical and scientific validation of algorithm accuracy.
• Maeda Kensetsu Kogyō Corporation (前田建設工業株式会社)coreStrategic or Co-development PartnerJoint research partner in algorithm development and early deployment site for heatstroke prevention technology. Provided real-world construction site environment for algorithm validation. Mitsufuji's hamon® product adopted across their construction sites for worker safety monitoring.
• Wacoal Corporation (株式会社ワコール) — iBRA ProjectflagshipStrategic or Co-development PartnerCo-developed iBRA, a bra-type IoT wearable for working women's health management. Mitsufuji provided textile technology and vital sensing capabilities; Wacoal provided intimate apparel design expertise. Result: hamon® platform customized for female worker health monitoring.
• Kimura Tan Co., Ltd. (株式会社キムラタン) — cocolin ProjectminorStrategic or Co-development PartnerCo-developed cocolin, a child health monitoring solution for nursery schools. Mitsufuji's hamon® vital sensing technology integrated into nursery child care platform for fever detection, prone sleeping alerts, and caregiver workload reduction.

Scale indicators6 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Kenzen: Kenzen builds wearable devices and a cloud platform that monitor physiological indicators (core temperature, heart rate, sweat) to prevent heat stress and injuries among industrial workers. Directly comparable to Mitsufuji's hamon band series for construction, manufacturing, and outdoor workforce heatstroke prevention.
• SmartCap (Hexagon): SmartCap (acquired by Hexagon) is a wearable fatigue and heat-stress monitoring product used in mining, transportation, and heavy industry. Like Mitsufuji, it focuses on occupational health monitoring for distributed industrial workforces with similar enterprise GTM.
• Catapult Sports: Catapult produces wearable athlete and workforce monitoring devices that track biometric and movement data via cloud platforms. While rooted in elite sports, its Vector and PlayerTek lines extend to industrial and tactical applications, sharing Mitsufuji's enterprise wearable + cloud analytics model.
• Biodata Bank (Canary): Biodata Bank's Canary is a wearable heatstroke prevention device used by 1,800+ Japanese companies. As a domestic Japanese competitor explicitly cited in the source data, Canary is the closest direct peer to Mitsufuji's hamon band series in the same regulatory environment.

Emerging players

• Empatica: Empatica makes medical-grade wearable biosensors (E4, Embrace) for continuous physiological monitoring including pulse, HRV, and temperature. Comparable to Mitsufuji's vital-sign monitoring approach, though Empatica targets clinical and research use cases more than industrial heat stress.
• Hexoskin (Carré Technologies): Hexoskin manufactures biometric smart-textile garments that capture heart rate, breathing, and activity data for health, research, and professional use. Closely comparable to Mitsufuji's hamon® wearable textile approach with continuous vital monitoring embedded in apparel.
• Myant: Myant develops textile computing platforms integrating conductive yarns into garments for health monitoring. Comparable to Mitsufuji's AGposs® silver-plated conductive fiber and hamon® wearable textile line, with shared smart-textile material science DNA.

Broad incumbents

• Garmin: Garmin's fenix, Instinct, and tactix lines include heart rate, stress, and body battery monitoring with ruggedized wearables targeting fitness, outdoor, and tactical/industrial users. As a broad incumbent, Garmin represents competitive risk to Mitsufuji in the industrial wearables space due to scale and brand.
• Polar Electro: Polar offers heart rate monitors, sports watches, and team/professional athlete monitoring solutions with strong heritage in physiological sensing. Its enterprise solutions (Team Pro, GoFit) overlap with Mitsufuji's workforce vitals monitoring concept, though Polar's focus remains fitness/sports.
• Whoop: Whoop produces a subscription-based wearable strap that monitors HRV, sleep, strain, and recovery. Although primarily consumer/fitness, Whoop's continuous biometric monitoring, recurring subscription model, and cloud-based dashboard architecture parallel Mitsufuji's hamon Cloud approach.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• Xx.com/mitsu24official

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds2 records

Investors7 records

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Mitsufuji