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  6. [No water supply or drainage] [No power required] Fully self-circulating flush toilet

[No water supply or drainage] [No power required] Fully self-circulating flush toilet

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last updated:Nov 09, 2026

COLUMBUS PROJECT Co.,Ltd. Tokyo
COLUMBUS PROJECT Co.,Ltd. Tokyo
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No need for sewage systems or commercial power! A completely self-sustaining flush toilet -asuthia- Asthia.

This is a fully circulating flush toilet that cleans and recirculates wastewater simply by supplying water during installation. Since it is a flush toilet and all processing occurs within the system, there is almost no need for vacuum trucks to pump it out. Additionally, it can be reused without discharging water, making it eco-friendly, low-cost, and energy-efficient. ☞ Low maintenance costs Due to the circulating system for sewage, the running costs are almost zero! The power consumption is also zero by utilizing a solar power generation system! ☞ Environmentally friendly with advanced wastewater treatment capabilities By utilizing a separation tank with unique patented technology, the water quality after purification is such that fish can live in it, eliminating unpleasant odors and considering the environment. ☞ Contributing to the community even in case of disasters Even in situations where flush toilets cannot be used due to disasters, water outages, or power outages, the solar power generation system allows for safe toilet use! It can also be moved by truck, making it ideal for evacuation centers. ☞ Can be installed anywhere Suitable for event venues, festivals, construction sites, glamping facilities, and campsites. It can also be installed in mountainous areas where there is no power or water supply and where pumping is not possible. Additionally, custom-made options are available to meet customer needs!

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[No water supply or drainage] [No power required] Fully self-circulating flush toilet

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◆ECO Toilet that Does Not Require Water Supply or Commercial Power No water supply or drainage facilities are needed. Additionally, it utilizes a solar power system, so commercial power is also unnecessary. It can be installed at event venues, festivals, construction sites, glamping facilities, campgrounds, and mountainous areas! ◆No Odor Leakage and Environmentally Friendly The tank is designed to block air, preventing unpleasant odors from leaking outside and considering the surrounding environment. ◆Hygienic with Flushing System The interior can be washed with water. Since it uses a flushing system, it is hygienic and safe for women to use.

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Applications/Examples of results

- Introduction of Achievements - 【Achievement 1】 Fujiyama Twin Terrace Parking Lot, Fuefuki City This is a tourist spot in Fuefuki City, Yamanashi Prefecture, where visitors can enjoy a stunning view of Mount Fuji from an observation deck. Due to the lack of electricity and water, a temporary pit toilet was initially used on-site, but we have installed Astia mobile temporary flush toilets for reasons related to odor and hygiene. 【Achievement 2】 Public Toilet at the Lily of the Valley Habitat Parking Lot, Fuefuki City The Lily of the Valley habitat attracts over 20,000 tourists annually, with more than 300 people using the restroom on busy days. Since it is designated as a national park and is an area where excavation is prohibited, the installation of a septic tank was not possible. However, upon request from Fuefuki City, we installed Astia's fixed soil flush toilets.

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COLUMBUS

COLUMBUS PROJECT Co.,Ltd. Tokyo

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We drive business growth by providing comprehensive support for sales, marketing, and content development. Our core expertise lies in the manufacturing industry, with a strong focus on industrial and medical equipment. We also offer specialized support in sales, marketing, and digital transformation (DX) for a wide range of B2B sectors, including construction, logistics, IT/DX, trading companies, and retail. Recognizing the heightened importance of the sales function in B2B, we actively champion the digitalization of sales processes in synergy with marketing initiatives. Collaborating with a robust network of professional partners, we successfully navigate and deliver on complex projects. For any inquiries or requests, please do not hesitate to reach out.

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COLUMBUS PROJECT Co.,Ltd. Tokyo

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