# ESEP Co.

Startup profile on Capital Atlas: https://capitalatlas.ai/startups/esep-co

- Industry: Chemicals
- Headquarters: Kyoto, Japan
- Website: www.esep.kyoto
- Total disclosed funding: $3.9M
- Latest round: Series C (Nov 5, 2025)
- Investors on record: 9

## About

Based in Kyoto, Japan, ESEP Co., Ltd. specializes in the design and development of advanced membrane technologies for applications in water treatment and environmental sustainability.Founded in 2013 in Kyoto, Japan, ESEP Co., Ltd. focuses on innovative membrane solutions for water treatment and industrial processes. The company's founder, Ken-ichi Sawamura, has a background in engineering and technology development. In November 2025, ESEP Co., Ltd. raised JPY 430 million amount in series C funding from new investors Money Forward Venture Partners, Global Brain, Kobe University Capital, Kyoto Capital Partners and MIRAIDOOR.

eSep, Inc's primary offerings encompass advanced membrane technologies that enhance filtration efficiency and reduce operational costs, specifically targeting water treatment, industrial processes, and environmental sustainability. Their solutions cater to municipalities, industrial facilities, and commercial enterprises that require improved water quality and treatment processes, and are marketed globally across North America, Europe, and Asia.In 2022, eSep, Inc generated revenue of JPY 659617.4 with an EBITDA of -JPY 1419663.6. Their revenue model is based on B2B transactions, capitalizing on long-term service contracts and direct sales of their flagship membrane products, which are recognized for their performance and efficiency in supporting clients' sustainability efforts.eSep, Inc plans to utilize its recent Series B funding to scale up production of its nano-ceramic separation membranes, which is crucial in advancing towards carbon neutrality. The company is targeting new market expansions into regions that include Southeast Asia and North America by 2025, along with the anticipated introduction of new membrane products aimed at further enhancing their market offering. In November 2025, ESEP Co., Ltd. raised an undisclosed amount of venture funding from new investor Money Forward Venture Partners. 

The company will use the November 2025 funding to enhance the mass production of separation membranes.

## Funding rounds

- Series C, Nov 5, 2025, $2.8M — Global Brain, MIRAIDOOR, Kyoto Capital Partners, Money Forward Venture Partners, Kobe University Capital
- Series B, Jan 31, 2025 — Chushin Venture Capital
- Series B, Jun 28, 2024, $1.1M — SBI Investment, Hiroshima Venture Capital, NITTOSEIKO CO., LTD.

## Investors

- SBI Investment (https://capitalatlas.ai/funds/sbi-investment) — Series B
- Hiroshima Venture Capital (https://capitalatlas.ai/funds/hiroshima-venture-capital) — Series B
- NITTOSEIKO CO., LTD. — Series B
- Chushin Venture Capital (https://capitalatlas.ai/funds/chushin-venture-capital) — Series B
- Global Brain (https://capitalatlas.ai/funds/global-brain) — Series C
- MIRAIDOOR (https://capitalatlas.ai/funds/miraidoor) — Series C
- Kyoto Capital Partners (https://capitalatlas.ai/funds/kyoto-capital-partners) — Series C
- Money Forward Venture Partners (https://capitalatlas.ai/funds/money-forward-venture-partners) — Series C
- Kobe University Capital (https://capitalatlas.ai/funds/kobe-university-capital) — Series C