Commercial model
$165.99 list price
A published price gives buyers a starting point for budgeting, ROI modeling, and peer comparison before deeper vendor conversations begin.
Robot dossier
Mirumi
Release
Apr 23, 2026
Price
$166
Connectivity
1
Status
Available
Height
14cm
Weight
155g
Battery
Approximately 8 hours
Companions
Available
Mirumi
Mirumi is a tiny clip-on companion robot from Yukai Engineering designed to create brief, playful moments of eye contact and curiosity in public or at home. Instead of navigating or speaking, it hangs from a bag strap or handle and reacts with shy glances, head turns, spontaneous motions, and touch-triggered responses. Official materials describe an onboard behavior algorithm fed by touch and sound sensing, while launch coverage and retail details confirm an approximately 155 g body, about 8 hours of battery life, and USB-C charging. Japan sales began in April 2026, while the U.S. Mirumi shop is taking pre-orders.
Listed price
$166
Official U.S. Mirumi store lists $165.99 pre-orders with expected ship date 2026-06-01; Japanese retail launch began 2026-04-23 at ¥19,800.
Release window
Apr 23, 2026
Current status
Available
Yukai Engineering
Last verified
Apr 23, 2026
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Technical overview
Core specifications and system stack
A fast read on the mechanical profile, sensing package, and platform integrations behind Mirumi.
Technical Specifications
Height
14cm
Weight
155g
Dimensions
100mm × 110mm × 140mm
Battery Life
Approximately 8 hours
Charging Time
Approximately 2 hours
Tech Components
Connectivity (1)
Operational profile
How this robot is configured
Capabilities
6
Connectivity
1
Key capabilities
Shy Glance and Head-Turn ReactionsSound and Voice ResponseTouch ResponseSpontaneous MotionBag Strap and Handle ClippingBaby-Like Expressive Behavior
Ecosystem fit
Backpack StrapsBag HandlesUSB-C Charging Cable
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Benchmark set
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About the Mirumi
4Sensors1Protocol6Capabilities$0.2kListed Price
The Mirumi is a Companions robot built by Yukai Engineering. Mirumi is a tiny clip-on companion robot from Yukai Engineering designed to create brief, playful moments of eye contact and curiosity in public or at home. Instead of navigating or speaking, it hangs from a bag strap or handle and reacts with shy glances, head turns, spontaneous motions, and touch-triggered responses. Official materials describe an onboard behavior algorithm fed by touch and sound sensing, while launch coverage and retail details confirm an approximately 155 g body, about 8 hours of battery life, and USB-C charging. Japan sales began in April 2026, while the U.S. Mirumi shop is taking pre-orders.
At a listed price of $165.99, it positions itself in the consumer-accessible segment of the companions market. See all Yukai Engineering robots on the Yukai Engineering page.
Spec Breakdown
Detailed specifications for the Mirumi
Height
14cmAt 14cm, the Mirumi is sized for its intended operating environment and use cases.
Weight
155gWeighing 155g, the Mirumi balances structural integrity with portability and maneuverability.
Dimensions
100mm × 110mm × 140mmThe overall dimensions of 100mm × 110mm × 140mm define the robot's physical footprint and determine what spaces it can navigate and what clearances it requires for operation.
Battery Life
Approximately 8 hoursWith a battery life of Approximately 8 hours, the Mirumi can operate for sustained periods before requiring a recharge. Battery life is measured under typical operating conditions and may vary based on workload intensity and environmental factors.
Charging Time
Approximately 2 hoursA charging time of Approximately 2 hours means the ratio of operation to downtime is an important consideration for applications requiring near-continuous availability. Some deployments use multiple robots in rotation to maintain uninterrupted service.
Maximum Speed
N/AA top speed of N/A is calibrated for the robot's primary operating environment and safety requirements.
The Mirumi uses Onboard IC chip running Yukai Engineering's randomized behavior algorithm for lifelike glance and reaction patterns as its intelligence backbone. This AI platform powers the robot's decision-making, perception processing, and autonomous behavior. The sophistication of the AI stack directly impacts how well the robot handles unexpected situations and adapts to new environments.
Mirumi Sensor Suite
The Mirumi integrates 4 sensor types, forming the perceptual foundation that enables autonomous operation.
Touch Sensor (head)
Details →
Dual Sound Sensors
Details →
Distance Sensor
Details →
Inertial Measurement Unit (IMU)
Details →
This sensor configuration enables the Mirumi to perceive its environment and operate autonomously in its intended use cases. Multiple sensor modalities provide redundancy and more robust perception than any single sensor type alone.
Explore sensor technologies: components glossary · full components directory
Mirumi Use Cases & Applications
Companion robots provide social interaction, emotional support, and entertainment. Unlike utility robots, their primary value proposition is the relationship they build with their owner. The best companions learn preferences, develop personalities, and create genuine emotional connections.
Capabilities That Enable Real-World Use
The Mirumi offers 6 distinct capabilities, each contributing to the robot's practical utility.
Shy Glance and Head-Turn Reactions
Sound and Voice Response
Touch Response
Spontaneous Motion
Bag Strap and Handle Clipping
Baby-Like Expressive Behavior
These capabilities work together with the robot's 4 onboard sensor types and Onboard IC chip running Yukai Engineering's randomized behavior algorithm for lifelike glance and reaction patterns AI platform to deliver practical, real-world performance.
Ecosystem Integration
The Mirumi integrates with the following platforms and ecosystems, extending its utility beyond standalone operation.
Backpack Straps
Bag Handles
USB-C Charging Cable
This ecosystem compatibility enables the Mirumi to work as part of a broader automation setup rather than operating in isolation.
Mirumi Capabilities
6
Capabilities
4
Sensor Types
AI
Onboard IC chip running Yuka…
Shy Glance and Head-Turn Reactions
Sound and Voice Response
Touch Response
Spontaneous Motion
Bag Strap and Handle Clipping
Baby-Like Expressive Behavior
Connectivity & Integration
How the Mirumi communicates with your network, smart home devices, cloud services, and companion apps.
Network & Communication Protocols
Network protocols for device communication — enabling the Mirumi to participate in various networking scenarios.
Mirumi Technology Stack Overview
The Mirumi by Yukai Engineering integrates 6 distinct technology components across sensing, connectivity, intelligence, and interaction layers. The physical platform features a height of 14cm, a weight of 155g, a top speed of N/A, providing the foundation on which this technology stack operates.
Perception — 4 Sensor Types
The perception layer is built on Touch Sensor (head), Dual Sound Sensors, Distance Sensor, Inertial Measurement Unit (IMU). These work in concert to give the robot a detailed understanding of its operating environment. This multi-sensor approach provides redundancy and enables the robot to function reliably even when individual sensors encounter challenging conditions such as low light, reflective surfaces, or cluttered spaces.
Connectivity — 1 Protocol
For communications, the Mirumi relies on USB-C (charging). This connectivity stack ensures the robot can communicate with cloud services, local smart home devices, mobile apps, and other networked systems in its environment.
Intelligence — Onboard IC chip running Yukai Engineering's randomized behavior algorithm for lifelike glance and reaction patterns
Onboard IC chip running Yukai Engineering's randomized behavior algorithm for lifelike glance and reaction patterns serves as the computational brain, processing sensor data, making navigation decisions, and orchestrating the robot's autonomous behaviors. The quality of this AI platform directly influences how well the robot handles novel situations, adapts to changes in its environment, and improves its performance over time through learning.
Who Should Consider the Mirumi?
Target Audience
Social and companion robots are purchased by families, elderly individuals, and tech enthusiasts looking for interactive, emotionally engaging robotic pets or social companions. They are particularly popular in Japan and increasingly in senior care contexts worldwide.
Key Considerations
Emotional expressiveness, interaction quality, voice recognition, personality development over time, and durability (especially for children) are what matter most. Privacy controls for cameras and microphones are increasingly important. Battery life determines how available the companion is throughout the day.
Price Context
At $165.99 (Official U.S. Mirumi store lists $165.99 pre-orders with expected ship date 2026-06-01; Japanese retail launch began 2026-04-23 at ¥19,800.), the Mirumi sits in the budget price tier for companions robots. This competitive price point makes the technology accessible to a broad consumer base.
Availability
AvailableThe Mirumi is currently available for purchase. Check the manufacturer's website or authorized retailers for the latest stock and ordering information.
Mirumi: Strengths & Trade-offs
Engineering compromises and where this companions robot excels
What the Mirumi does well
Solid sensor coverage
The Mirumi integrates 4 sensor types, providing good perceptual coverage for its intended applications. This sensor complement covers the essential modalities needed for effective companions operation while keeping complexity manageable.
Broad capability set
With 6 distinct capabilities, the Mirumi is designed as a versatile platform rather than a single-task device. This breadth means the robot can handle varied scenarios and workflows, reducing the need for multiple specialized robots and increasing its utility across different situations.
Extended battery life
A battery life of Approximately 8 hours provides substantial operational runway. For companions applications, this means longer work sessions between charges, fewer interruptions, and the ability to complete larger tasks or cover more area in a single charge cycle.
Currently available
Unlike many robots that remain in development or prototype stages, the Mirumi is available for purchase today. This means you can evaluate the actual shipping product rather than making decisions based on projected specifications that may change before release.
Accessible price point
At $165.99, the Mirumi is competitively priced within the companions market. This price point makes the technology accessible to a broader audience and represents a lower barrier to entry for those exploring companions robotics.
Note: This strengths and trade-offs assessment is based on the Mirumi's documented specifications as tracked in the ui44 database. Real-world performance depends on deployment conditions, firmware maturity, and environmental factors. For the most current information, check the Yukai Engineering manufacturer page or visit the official product page. Use the comparison tool to evaluate these trade-offs against competing robots in the same category.
How Companions Robot Technology Works
Understanding the engineering behind this category
Companion robots sit at the intersection of engineering and emotional design. Unlike utility robots measured by specifications like suction power or payload capacity, companion robots are judged by how well they make people feel — their expressiveness, responsiveness, personality, and ability to form genuine-seeming bonds with their owners. The technology behind these emotional machines is surprisingly sophisticated, drawing from psychology, animation, and cutting-edge AI.
Navigation & Mobility
Companion robots typically operate in confined indoor spaces and prioritize safe, predictable movement over sophisticated mapping. Most use simple but effective navigation combining bump sensors, cliff detection, and basic obstacle avoidance. Some advanced models incorporate camera-based person-following — the ability to track and follow a specific person through rooms. Unlike utility robots that need systematic coverage, companion robots navigate toward social engagement: moving toward voices, approaching detected family members, or positioning themselves for optimal interaction. The movement itself is often designed to convey personality — a curious robot might lean forward when exploring, while a timid one might approach cautiously.
The Role of AI
AI is the heart of a companion robot's appeal. Emotion recognition systems analyze facial expressions, voice tone, and behavioral patterns to infer the user's emotional state and respond appropriately. Natural language processing enables conversational interaction that goes beyond simple command-response patterns. Personality systems create consistent behavioral traits that make the robot feel like an individual rather than a generic device. Machine learning allows the robot to adapt to its owner's preferences, schedule, and interaction style over time. The most advanced companion robots use generative AI to create novel responses and behaviors rather than relying solely on pre-programmed scripts, making interactions feel more natural and less repetitive.
Sensor Fusion & Perception
Companion robot sensors prioritize social perception over environmental mapping. Cameras detect faces, read expressions, and enable recognition of family members. Microphone arrays with beamforming capture and localize voice from across a room, enabling natural conversation without shouting. Touch sensors across the body detect petting, hugging, and other physical interaction, triggering appropriate emotional responses. Some models include heart-rate or breathing-rate sensors in their touch surfaces, enabling health-monitoring features for elderly users. Temperature and light sensors help the robot understand context — bedtime versus activity time — and adjust its behavior accordingly.
Power & Battery Management
Companion robots need to be available throughout the day to maintain the social bond with their owner. Battery life of eight hours or more is typical, with automatic return-to-charging-dock behavior when levels drop. Power management is designed to be invisible — the robot should seem always available and never interrupt a social moment to announce low battery. Some companion robots use sleep modes during inactive periods, with motion or sound detection to wake instantly when the owner approaches. Charging docks often double as the robot's designated resting spot, making the charging behavior feel natural rather than mechanical.
Safety by Design
Companion robots prioritize child and elderly safety with rounded corners, pinch-free joint designs, and materials safe for skin contact. Emotional safety is equally important — companion robots are designed to never express anger, fear, or distress in ways that could upset vulnerable users. Privacy features include physical camera covers, microphone mute buttons, and transparent data handling policies. For elderly users, companion robots may include fall-detection alerts, activity monitoring, and remote check-in features that balance safety with privacy. The robot's emotional responses are carefully calibrated to avoid over-attachment or dependency concerns.
What's Next for Companions Robots
Companion robotics is evolving toward more nuanced emotional intelligence, deeper personalization, and expanded health-monitoring capabilities. Advances in generative AI are enabling more natural and varied conversational interaction. Future companion robots may serve as health monitoring platforms that detect changes in an owner's mood, activity levels, or cognitive patterns — providing early warning of health issues to family members or caregivers. The integration of companion features into utility robots (and vice versa) may blur category boundaries, creating household robots that are both helpful and emotionally engaging.
The Mirumi by Yukai Engineering incorporates many of these technology pillars. For a detailed look at the specific sensors and components used in the Mirumi, see the sensor analysis and connectivity sections above, or browse the complete components glossary for explanations of every technology used across the robotics industry.
Mirumi in the Companions Market
How this robot compares in the companions landscape
At $165.99, the Mirumi competes in the entry-level segment of the companions market, where affordability is the primary consideration for most buyers.
The Mirumi's 4 sensor types provide solid perceptual coverage for its intended use cases. This mid-range sensor suite balances cost with capability, covering the essential modalities needed for companions applications.
Being currently available for purchase gives the Mirumi a practical advantage over competitors still in development or prototype stages. Buyers can evaluate the actual product rather than relying on spec-sheet promises that may change before release.
Head-to-Head Comparisons
Side-by-side specs, capability overlap analysis, and key differentiators.
For the full picture of Yukai Engineering's portfolio and market strategy, visit the Yukai Engineering manufacturer page.
Deployment Readiness and Procurement Signals for Mirumi
What the public profile tells you, and what still needs direct vendor confirmation
From a buying and rollout perspective, the Mirumi should be read as a companions platform aimed at social, education, or care environments where interaction quality matters. ui44 currently tracks 6 capability signals, 4 sensor inputs, and a last verification date of 2026-04-23. That mix gives buyers a useful first-pass picture, but it is still only the public layer of due diligence, especially when procurement, uptime, and support commitments are decided directly with Yukai Engineering.
Integration posture
1 connectivity option
The profile lists USB-C (charging), plus Onboard IC chip running Yukai Engineering's randomized behavior algorithm for lifelike glance and reaction patterns as the AI stack. That is enough to infer the basic network posture, but buyers should still confirm APIs, fleet management, and workflow integration details. ui44 currently tracks 3 declared compatibility links.
Spec disclosure
5/7 core specs public
ui44 currently has 5 of 7 core physical and operating specs filled in for this model, leaving 2 gaps that matter for deployment planning. Missing runtime, charge, speed, or payload details can materially change staffing and site-readiness assumptions.
The current profile is detailed enough to support early comparison work, shortlist creation, and cross-checking against other companions robots. It is still worth validating the final deployment package, because integration services, support coverage, software entitlements, and site-preparation requirements often sit outside the raw hardware spec sheet.
If you want a faster apples-to-apples read, compare the Mirumi against nearby alternatives in ui44's compare view, then cross-check the underlying AI, sensor, and subsystem terms in the components glossary. For manufacturer-level context, the Yukai Engineering profile helps anchor this robot inside the wider product lineup.
Before you sign off on a pilot, confirm these points
- Verify travel speed and cycle time if the robot must keep up with people, lines, or service windows.
- Clarify usable payload or tool-load limits before planning material handling or mounted accessories.
- Check what safety, electrical, or deployment certifications exist for the region and task you care about.
Owning the Mirumi: Setup, Maintenance & Tips
Practical guide from day one through years of ownership
Initial Setup
Companion robot setup is designed to be simple and engaging — the first interaction sets the tone for the relationship. Typical setup involves charging the robot, downloading the companion app, connecting to Wi-Fi, and going through an introduction sequence where the robot learns your face and name. Many companion robots have a personality development phase during the first few days, where they become more responsive and personalized as they learn your voice, habits, and preferences. Place the charging dock in a social area where the robot can be part of daily life rather than tucked away in a corner. Introduce the robot to all family members during setup so it can learn to recognize everyone.
Ongoing Maintenance
Companion robots generally require minimal maintenance. Weekly care includes wiping the exterior with a soft cloth, checking that sensors and cameras are clean, and ensuring the charging dock area is clear. Monthly tasks include checking for and installing software updates, cleaning any microphone or speaker grilles, and inspecting the wheels or locomotion system for hair or debris. The emotional design means that maintenance should feel like care rather than servicing — many owners naturally incorporate it into their interaction with the robot.
Software Updates & Long-Term Support
Software updates for companion robots often add new behaviors, expressions, voice capabilities, and interaction patterns. These updates keep the relationship fresh and can significantly enhance the robot's emotional range and social intelligence over time. Most companion robots update automatically during sleep or charging periods. Some manufacturers offer premium content subscriptions that add seasonal behaviors, educational content, or language capabilities.
Maximizing Longevity
Companion robots typically last three to five years or more with gentle handling. The primary concerns are battery health and physical wear from daily interaction. Avoid dropping the robot or handling it roughly, especially the camera and sensor areas. Keep the robot away from water and extreme temperatures. Battery life will gradually decrease over time; contact the manufacturer about battery replacement options when charging becomes noticeably more frequent. For children's companion robots, supervise initial interactions to establish gentle handling habits.
For Yukai Engineering-specific support resources and documentation, visit the Yukai Engineering page on ui44 or check the manufacturer's official website at Yukai Engineering's product page.
Frequently Asked Questions
What is the Mirumi?
The Mirumi is a Companions robot made by Yukai Engineering. Mirumi is a tiny clip-on companion robot from Yukai Engineering designed to create brief, playful moments of eye contact and curiosity in public or at home. Instead of navigating or speaking, it hangs from a bag strap or handle and reacts with shy glances, head turns, spontaneous motions, and touch-triggered responses. Official materials describe an onboard behavior algorithm fed by touch and sound sensing, while launch coverage and retail details confirm an approximately 155 g body, about 8 hours of battery life, and USB-C charging. Japan sales began in April 2026, while the U.S. Mirumi shop is taking pre-orders. It features 4 sensor types, 1 connectivity protocols, and 6 distinct capabilities.
How much does the Mirumi cost?
The Mirumi is listed at $165.99 (Official U.S. Mirumi store lists $165.99 pre-orders with expected ship date 2026-06-01; Japanese retail launch began 2026-04-23 at ¥19,800.). This places it in the budget-friendly consumer tier for companions robots. Prices may vary by region and retailer.
Is the Mirumi available to buy?
Yes, the Mirumi is currently available for purchase. Check Yukai Engineering's official website or authorized retailers for the latest stock and ordering options.
What sensors does the Mirumi have?
The Mirumi is equipped with 4 sensor types: Touch Sensor (head), Dual Sound Sensors, Distance Sensor, Inertial Measurement Unit (IMU). These sensors work together through sensor fusion to provide comprehensive environmental awareness for autonomous operation. See the sensor analysis section for details.
How long does the Mirumi battery last?
The Mirumi has a rated battery life of Approximately 8 hours and charges in Approximately 2 hours. Actual battery performance may vary based on usage intensity, ambient temperature, and specific tasks being performed. Heavy workloads like continuous navigation and sensor processing will consume battery faster than idle or standby modes.
What AI does the Mirumi use?
The Mirumi is powered by Onboard IC chip running Yukai Engineering's randomized behavior algorithm for lifelike glance and reaction patterns. This AI platform handles the robot's perception processing, decision-making, and autonomous behavior. The sophistication of the AI directly impacts how well the robot handles unexpected situations, learns from its environment, and improves over time.
How does the Mirumi compare to the OlloNi?
The Mirumi and OlloNi are both companions robots, but they differ in key specifications, pricing, and manufacturer approach. Use the side-by-side comparison tool to see detailed differences in specs, sensors, and capabilities. You can also browse other similar robots below.
Does the Mirumi work with smart home systems?
Yes, the Mirumi is compatible with: Backpack Straps, Bag Handles, USB-C Charging Cable. This ecosystem integration allows the robot to work alongside your existing smart home devices and platforms rather than operating as an isolated system.
How current is the Mirumi data on ui44?
The Mirumi specifications on ui44 were last verified on 2026-04-23. All data is sourced from official Yukai Engineering documentation, spec sheets, and press releases. If you notice any outdated information, please let us know.
Data Integrity
All Mirumi data on ui44 is verified against official Yukai Engineering sources, including spec sheets, product pages, and press releases. Last verified: 2026-04-23. Official source: Yukai Engineering product page. If you find outdated or incorrect information, please let us know — accuracy is our top priority.
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