We recently visited the TOTO Technical Center in Yoyogi, Shibuya, Tokyo, where we experienced firsthand a range of innovative solutions in restroom design—from barrier-free layouts and energy-saving technologies to the latest in IoT-based health monitoring. Here’s a summary of what we saw and learned.
Over 100 Years of Evolution: From Japan’s First Flush Toilet to the Modern Neorest
Our tour began in the history zone, where the evolution of TOTO’s technologies was on full display. Three particularly striking models highlighted Japan’s progress in restroom innovation:
- 1914: Japan’s first domestic flush toilet – A groundbreaking product that revolutionized hygiene across the country.
- 1980: Washlet G – The first model to popularize warm-water cleaning, establishing a new standard of personal hygiene in Japanese homes.
- 1993: First-generation Neorest – A tankless toilet that reduced water use from the then-standard 13 liters per flush to just 8 liters for large flushes and 6 liters for small ones. (Today’s models use as little as 3.8 liters.)
This level of water-saving technology—improving by 70% over 30 years—is a clear testament to TOTO’s relentless pursuit of innovation. The historical background of these developments, including early issues with high-rise drainage systems, added valuable context.
Understanding the Differences in Drainage Systems—With Real Working Demos
Next, we moved on to a hands-on demonstration comparing three types of toilet drainage systems. Seeing them in action made it easier to understand which systems suit which types of facilities:
- Flush valve system – Direct water pressure without a tank enables continuous use, ideal for high-traffic areas like stations.
- Tank system – A conventional setup with water stored in a tank. Easier to install, but not suitable for rapid, repeated use.
- Flush tank system – A hybrid that combines the benefits of both above, using pressurized water with a compact tank.
These demonstrations reaffirmed the importance of choosing the right drainage system based on anticipated user volume—something best addressed early in the planning phase.
Eco Remote & UV Disinfection: Saving Electricity While Promoting Hygiene
One of the most impressive features aimed at public facility design was the Eco Remote—a wireless control panel that generates power with the push of a button, requiring no batteries or electrical wiring. Its thinner profile also improves cleanliness and reduces maintenance.
We also learned about a UV-light-based lid sterilization system featured in some overseas models (notably in China). With just a button press, ultraviolet light cleans the underside of the toilet lid—an emerging hygiene solution that may play a larger role in future facility standards.
Toilets as Health Devices: The Rise of the “Stool Sensor”
TOTO’s latest toilet models feature a sensor that automatically analyzes stool shape and consistency, referencing the Bristol Stool Scale. The data is visualized via a smartphone app to help users track their health. Toilets, once purely functional, are evolving into everyday health monitoring tools. With AI-powered analytics and daily data accumulation, this could open new possibilities in wellness tracking.
Showerhead with Three Modes: A Complete Bathing Routine in One Device
Beyond toilets, we also tested the Comfort Wave Shower and its three water flow modes:
- Warm Pillar – A thick, enveloping stream that keeps you warm without getting cold easily. Best used at the start to raise body temperature.
- Natural Care Mist – An ultra-fine mist containing microbubbles that gently cleanse the skin. Works especially well after using the Warm Pillar, as it helps clean open pores.
- Comfort Wave – A strong yet efficient stream ideal for washing hair and body thoroughly while conserving water.
These modes can be combined to create a personalized bathing routine. We found this feature especially appealing for hotels and spas looking to offer a premium guest experience.
Barrier-Free Lab: Designing Layouts Through Real-Time Simulation
We ended our tour in the Barrier-Free Lab, a modular space where wheelchair users and caregivers can simulate realistic movements. Fixtures can be rearranged freely to test layout and accessibility. Products like toilets with backrests were installed, and we were able to physically experience them. Compared to working off blueprints alone, this type of hands-on testing provides a much clearer sense of comfort and usability.
5 Key Takeaways for Designers and Facility Planners
Based on this visit, we identified five key benefits that TOTO Technical Center offers to professionals in design and construction:
- Reduced design risks through real-life layout testing – Seeing and adjusting actual equipment helps eliminate guesswork and reduce layout errors.
- Drainage system planning based on usage – Testing systems against expected traffic levels helps optimize facility efficiency and reduce maintenance costs.
- Energy-free devices for cost and sustainability – Products like the Eco Remote support energy conservation and align with SDGs, while cutting operational costs.
- IoT-integrated toilets for enhanced user satisfaction – Health-aware features like stool sensors offer high-added-value services, especially for healthcare or hospitality facilities.
- End-to-end support from planning to maintenance (TOTO × Our Company) – With close cooperation between TOTO and our team, we provide full support from layout design through installation and aftercare.
If you’re involved in facility development, we highly recommend visiting TOTO Technical Center to experience these innovations firsthand.
Conclusion
TOTO Technical Center is more than a showroom—it’s a place to discover practical answers to real-world challenges in accessibility, sustainability, and smart technology. For our team, the visit sparked new ideas and highlighted areas where we can offer even greater value to our clients. Thanks to our partnership with TOTO, we’re now better equipped to offer end-to-end support for restroom design and implementation.
If you’re interested in the latest restroom technologies or would like to discuss a specific project, please don’t hesitate to reach out.
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