What Est does

Est Co., Ltd. (株式会社エスト) is a Japanese private IoT hardware company founded in August 2013 by Susumu Shiratori (formerly a marketing executive at Yamaha Corporation) and headquartered in Hamamatsu, Shizuoka Prefecture. The company designs, develops, and manufactures in-house a portfolio of sensor-based security and monitoring products marketed under its "Mihariban" (見張り番) brand. The lineup includes single-person household security alarms (ST-100, CS-500), cabinet security for sensitive document protection (ST-200, targeted at MyNumber compliance), a universal air-conditioner remote control system (AC-1), multi-function toilet occupancy displays (WT-30, WT-55), and elderly activity monitoring systems for home (LC-900) and facility (LC-1000) deployment. The underlying platform combines IoT terminals with integrated sensors, 2.4GHz wireless communication, internet/cloud connectivity, and AI-assisted data processing to deliver smartphone-based remote monitoring, alerts, and control.

Est operates a hybrid revenue model combining one-time hardware sales (¥15,000–¥27,000 ex-tax per unit) with recurring cloud subscriptions, typically a 3-year bundled service period after which fees of ¥300–¥1,500/month apply per product. Distribution is direct-to-consumer through the company's Japanese website (rx.esuto.co.jp) and a Yahoo! Shopping storefront, with payment options spanning credit card, convenience store, cash-on-delivery, and corporate invoicing; enterprise SKUs (AC-1, WT-55, WT-30, LC-1000) are quoted via phone or email. Target segments span individual consumers (single-person households, families with elderly relatives), senior living facilities, hospitality operators (leisure hotels, vacation rentals), companies handling MyNumber-sensitive documents, and public facilities with accessible toilets.

Est has no disclosed external funding, parent company, or subsidiaries, operates exclusively in Japan, and carries a registered capital of ¥5,000,000. Validations include formal recognition by a Police Department Security Planning Division in 2015 for the ST-100, multi-outlet media coverage of the ST-200 (2015) and CS-500 (2016), and ongoing trade show participation including the Leisure Hotel Fair (2023), New Value Creation Expo (2019), and Leisure & Service Industry Expo (2019).

Name

Est

Legal name

株式会社エスト

Website

https://rx.esuto.co.jp

Company type

Private

Founded year

2013

Operating status

Operating

Short description

Est Co., Ltd. is a Japanese IoT hardware company that designs, manufactures, and sells sensor-based security and monitoring products—including household alarms, cabinet security, universal AC remote controls, toilet occupancy displays, and elderly activity monitors—primarily to Japanese consumers, hospitality operators, and senior care facilities.

Ownership category

akta.pro rank

Product category

IoT Security and Monitoring Devices

NAICS

Security Systems Services (except Locksmiths) (561621), Other Measuring and Controlling Device Manufacturing (334519)

SIC

Measuring & Controlling Devices, Nec (3829), Auto Controls For Regulating Residential & Comml Environments (3822)

akta.pro primary industry

Home Security & Access Control (Cameras, Alarms, Smart Locks) (HSAPAQAB)

akta.pro secondary industries

Elder Care, Wellness & Home Health IoT (Fall Detection, Medical Alerts, Sleep/Wellness Sensors) (HSAPAQAJ), Self-Monitored Intrusion Alarm Services (HSAHAAAB)

Keywords

• IoT security systems
• Remote monitoring devices
• Elderly care sensors
• Smart home alarms
• Facility management sensors

Headquarters

HQ city

Shizuoka

HQ country

Japan

HQ region

Asia

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Hardware Product Sales: Sale of IoT security and monitoring devices including ST-100, ST-200, AC-1, WT-55, WT-30, LC-900, and LC-1000. Products are priced as one-time purchases with optional accessories.
2. Cloud Service Subscriptions: Ongoing service fees for cloud connectivity and monitoring. Products include 3-year service packages (e.g., AC1 at 10,800 yen for 3 years, 300 yen/month thereafter), and monthly subscriptions (e.g., LC-900 at 300 yen/month, LC-1000 at 1,500 yen/month).

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels5 records

Core offering

Est designs, develops, and manufactures in-house a portfolio of IoT-based security and monitoring devices (the "Mihariban / 見張り番" product line) that use integrated sensors and 2.4GHz wireless communication to transmit data over the internet to a cloud center for AI-assisted analysis, with results delivered to users' smartphones. The portfolio spans single-person household security alarms (ST-100, CS-500), cabinet access monitoring for personal-information compliance (ST-200), universal remote air-conditioner control (AC-1), toilet occupancy displays (WT-30, WT-55), and subscription-based elderly activity monitoring systems (LC-900, LC-1000).

Product overview

Est (株式会社エスト) offers a unified portfolio of IoT-based monitoring and security products, all designed, developed, and manufactured in-house for cost competitiveness. The product lineup centers on five core platforms: (1) the AC-1 remote air conditioner control system for hospitality and residential applications; (2) the LC-900 and LC-1000 elderly monitoring systems — a subscription-based (from ¥300/month) home monitoring system using IoT activity sensors with SMS alerts, alongside a real-time facility management version with activity dashboards and air conditioner integration; (3) the WT-55/WT-30 toilet status display systems using AI-driven motion and door sensors with QR-code smartphone access; (4) the ST-200 cabinet monitoring system for corporate information security and MyNumber compliance; and (5) the ST-100 and CS-500 security alarm systems for single-person households, featuring wireless sensors, remote controls, and loud sirens. Optional add-on sensors (ST-103 through ST-105), additional remotes, and magnets are available across the ST product family. All systems send data over the internet to cloud-based centers for processing and smartphone display.

Differentiator

Problem solved

Functional benefit

Brands

• 見張り番: 主力製品ブランド。IoTを活用した見守り・防犯警報システム製品群。「ひとり暮らしの見張り番」「キャビネットの見張り番」「エアコンの見張り番」「トイレの見張り番」「高齢者見守りシステムLCシリーズ」などの製品を傘下に持つ。

Products and services

• ひとり暮らしの見張り番 ST-100 (Hitori Gurashi no Mihariban ST-100) Security alarm system for single-person households that emits a 100-decibel on-premise siren during forced-entry robberies or push-in intrusions at the door. Includes door/window open-close sensors, wireless remote control, and a patent-pending delay/waiting time function that distinguishes normal entry from intrusion. Priced at ¥20,000 ex-tax (one-time) with optional additional sensors (ST-103, ST-104, ST-105) and remotes.
• キャビネットの見張り番 ST-200 (Cabinet no Mihariban ST-200) Cabinet monitoring and access management system designed for preventing information leakage of sensitive documents such as MyNumber. Features 30-second pre-alarm warning, 100dB siren, LED access-history indicator, battery backup, and dual-control workflows where key custodian and manager each hold separate remote credentials. Priced at ¥15,000 ex-tax (one-time).
• エアコンの見張り番 AC-1 (Air Conditioner no Mihariban AC-1) Japan's only remote air-conditioner control system compatible with any brand or model of residential or commercial AC unit without wiring or infrared configuration. Connects via WiFi for smartphone/PC remote ON/OFF operation with temperature/humidity monitoring, enabling documented electricity savings of over ¥20,000 per room per year. Business type AC1-HAEX at ¥25,000, home type AC1-IR at ¥20,000, with 3-year bundled service and ¥300/month from year 4.
• トイレの見張り番 WT-30 (Toilet no Mihariban WT-30) Standard toilet occupancy status display system using micro-motion detection, range-finding sensors, and AI to accurately determine occupancy. Simple setup by mounting inside the toilet booth and connecting to WiFi; users access status via QR-code scans on their smartphones. Priced at ¥20,000 total (¥9,200 machine + ¥10,800 for 3-year cloud service) with ¥300/month from year 4.
• 多機能トイレの見張り番 WT-55 (Multi-function Toilet no Mihariban WT-55) Multi-function toilet availability display system using door open/close sensors and motion sensors combined with AI detection. Visitors scan a QR code with a smartphone to find nearby available accessible toilets; facility managers can set extended-stay alerts and cleaning status from their phones. Priced at ¥20,000 total with the same bundled 3-year cloud service and ¥300/month from year 4.
• 高齢者見守りシステム LC-900 (Elderly Monitoring System LC-900) Low-cost elderly monitoring system (from ¥300/month) that detects continuous activity absence and unusual living patterns through IoT sensors and sends SMS push notifications when pre-set activity-free intervals are exceeded. Includes a parent unit (LC-900A) and additional child units (LC-900B) that auto-mesh, with 48-hour activity graphs and group sharing so multiple family members can monitor. Suitable for families with elderly relatives living alone and community watch programs.
• 高齢者施設用見守りシステム LC-1000 (Elderly Facility Monitoring System LC-1000) Real-time activity monitoring system for elderly care facilities, displaying nighttime activities per resident with buzzer alerts to optimize staff night patrols based on actual activity detection. Includes remote air-conditioner control to prevent heatstroke and reduce electricity waste. Machine priced at ¥20,000 with cloud service at ¥1,500/month (no service charge for unoccupied months).
• お部屋の見張り番 CS-500 (Oheya no Mihariban CS-500) Security alarm system for single-person households (お部屋の見張り番) with an annual cloud service fee of ¥6,000 (¥500 × 12 months). Promoted extensively through television and newspaper media coverage in 2016.

Quantifiable outcome

• Electricity cost reduction of 20,000+ yen/year per room for 29-tatami home AC in Tokyo
• +2 more outcomes

Named customers3 records

Segments6 records

Ideal customer profiles6 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Scale indicators3 records

Recent moves5 records

Expansion highlights4 records

Broad incumbents

• ALSOK (Sohgo Security Services): Major Japanese security services provider with full monitored home security, elderly care monitoring, and facility surveillance offerings. Comparable in customer segments to Est but operates a vastly larger installed base with professional monitoring infrastructure.
• Secom: Japan's largest security services company offering monitored home security, medical alerts, and intrusion detection. Serves overlapping customer segments (households, seniors) but operates at national scale with 24/7 monitoring — the inverse of Est's self-monitored, hardware-led model.
• i-PRO (Panasonic): Spun off from Panasonic in 2019 to focus on professional security, surveillance, and IoT solutions. Competes in adjacent Japanese smart home/facility monitoring segments with significantly larger R&D resources and global footprint than Est.

Direct peers

• Konica Minolta (HitomeQ): Operates the HitomeQ elderly monitoring solution targeting senior care facilities and families — directly comparable to Est's LC-900 and LC-1000 lines. Konica Minolta brings greater brand credibility and enterprise sales reach to the same Japanese eldercare monitoring opportunity.
• Secual: Japanese IoT home security startup offering smart home security with cameras, sensors, and mobile monitoring. Closest direct peer in business model — Japanese IoT-based security for consumers and small businesses — competing for similar self-monitored, smartphone-first customers.
• SwitchBot: Smart home IoT brand offering hub, sensors, AC controllers, and elderly monitoring accessories. Comparable in Japan market for self-installed consumer IoT across multiple home automation use cases overlapping with Est's portfolio.
• Nature (Nature Remo): Japanese smart home company whose flagship Nature Remo is a universal smart AC/IR remote controller — directly comparable to Est's AC-1 in functionality. Nature has achieved stronger consumer brand recognition and Series C+ venture backing.
• Anker Japan (Eufy): Global consumer electronics brand offering self-monitored home security cameras, doorbells, and alarm systems under the Eufy line. Comparable in self-monitored, no-monthly-fee consumer security positioning targeting similar homeowner personas in the Japanese market.

Market position

Strengths5 records

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

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 Est