TOTO LAUNCHES S2 AND S5 WASHLET ELECTRONIC BIDET SEATS FEATURING NEXT-GENERATION INSTANT WATER HEATING TECHNOLOGY
[December 2025] — TOTO Vietnam officially launches the new S2 and S5 WASHLET electronic bidet seats, integrating next-generation instant water heating technology with a spiral heat-exchange structure, delivering instant, stable, and personalized warm water for every user. Through continuous product innovation, TOTO Vietnam reaffirms its commitment to pioneering safe, comfortable hygiene standards for every household.
Clean – safe – economical and comfortable for every family
As young Vietnamese families increasingly prioritize comfort, safety, and hygiene in their living spaces, the new S2 and S5 WASHLET electronic bidet seats are developed to meet exactly these needs: clean – safe – economical – easy to use for every family member, from children to the elderly. TOTO Vietnam continues to innovate, carrying forward its more than 100-year mission of delivering a safer and more comfortable lifestyle for consumers every day.
Innovated design: sleek, minimalist, and intelligent
The S2 and S5 WASHLET electronic bidet seats feature a slimmer, more streamlined design compared to the previous C2/C5 generation, with minimized gaps to reduce dust accumulation. Soft, flowing curves and an optimized height allow the unit to blend harmoniously with the toilet, creating a refined and elegant appearance. The ergonomically designed seat enhances user comfort and allows for easy cleaning, while the sleek lines and intuitive control layout deliver a more natural and user-friendly experience. With simplified detailing that retains TOTO’s signature precision, the S2 and S5 WASHLET seamlessly complement a wide range of bathroom interior styles, from modern minimalism to sophisticated luxury.
For the WASHLET S2 model, the side control panel has been reduced by 50mm and the button layout has been reorganized to allow easier operation. Meanwhile, the WASHLET S5 is equipped with a separate remote control featuring a minimalist, intuitive, and easy-to-remember button design. These improvements make both the S2 and S5 well-suited for families seeking products that are more aesthetic, hygienic, and convenient for daily use.
Overall, the WASHLET S2/TCF33461GAA and WASHLET S5/TCF34461GAA launched this time have been comprehensively refined in terms of design, with optimized functional modules that reduce the overall size by 19%, creating a compact, harmonious, and visually balanced appearance aligned with contemporary minimalist trends. For young families, where bathroom fixtures are not only functional necessities but also reflections of lifestyle, these new models offer a more refined, spacious, and modern bathroom environment – an increasingly important factor in today’s urban homes.
Next-generation instant water heating technology: smart efficiency and energy saving
The WASHLET S2 and WASHLET S5 are equipped with a new-generation instant water heating system that utilizes a spiral-structured heat exchanger. By guiding water in a spiral flow around the heating element, the heat transfer surface is optimized, allowing the water to quickly reach the preset temperature even when the inlet water temperature is low. This improvement is particularly well suited to the usage habits of Vietnamese households, especially during colder mornings when a stable supply of warm water is essential.
The instant heating mechanism also completely eliminates concerns about running out of warm water – a common limitation of conventional tank-type bidet seats. Warm water is generated continuously, allowing multiple users to use the WASHLET consecutively while maintaining a consistently comfortable and pleasant experience.
Beyond enhanced convenience, the direct-heating system also significantly improves energy efficiency. By eliminating the need to maintain a preheated water tank and leveraging the high thermal efficiency of the spiral heat-exchange structure, the WASHLET S2/S5 reduces annual energy consumption by up to 38% compared to old technologies. Lower continuous heating demand also helps extend the lifespan of internal components, particularly the heating element, ensuring long-term durability and reliable performance.
The core technology is preferred
The WASHLET S2 and S5 are equipped with a full range of core features highly favored by users. Both models integrate multi-mode washing functions for rear and front cleansing, along with EWATER+ electrolyzed water technology that automatically sanitizes the spray wand after each use. The toilet bowl is pre-misted with PREMIST technology to help prevent waste from adhering to the surface, while the heated seat, deodorizer, and warm air dryer deliver maximum comfort throughout use.
WASHLET S2/TCF33461GAA electronic bidet seat with side control panel.
WASHLET S5/TCF34461GAA electronic bidet seat with remote control.
With rising living costs and the growing preference for sustainable products, the WASHLET S2/S5 electronic bidet seats deliver long-term, practical value for households. Their smart operating efficiency not only helps reduce energy consumption but also reflects TOTO’s commitment to developing hygienic solutions that enhance everyday comfort while remaining responsible toward the environment and users’ well-being.
Sharing insights on the significance of the new product line, Mr. Asada Kyoji, President of TOTO Vietnam, stated:
“At TOTO, technology is never static, it continually evolves to serve people better. With the WASHLET S2 and S5, we are not only addressing space efficiency through minimalist design, but more importantly, enhancing quality of life through advanced spiral heating technology. This innovation is especially meaningful for Vietnamese families, as the demand for stable warm water and energy efficiency is becoming a new standard of modern living. It reflects our commitment to delivering lasting comfort and peace of mind to our customers.”
Paired with TOTO toilet bowls, the WASHLET S2/S5 electronic bidet seats fully deliver Japan’s signature hygiene standards, including CEFIONTECT anti-fouling glaze, RIMLESS bowl design, and TORNADO FLUSH technology. These features help minimize residue buildup, reduce bacterial accumulation, and make cleaning easier – an especially practical advantage for busy households, particularly for homemakers who prioritize a clean and safe bathroom environment.
By launching these two new WASHLET models, TOTO aims to bring peace of mind to every family member, from the elderly to young children. Ensuring the highest standards of hygiene and safety is not merely a product feature, but a core part of TOTO’s long-standing commitment to enhancing quality of life for generations.
