# Toyobo MC to invest 1 billion yen to triple RO membrane capacity at Iwakuni plant

Toyobo MC announced an approximately 1 billion yen investment to expand production capacity of hollow-fiber RO membrane 'Hollowsep' at its Iwakuni plant in Yamaguchi Prefecture, Japan. A new spinning line will triple current capacity, with operations expected to start in summer 2026. BC membrane capacity for salt and lithium recovery will also double.

- Type: Expansion
- Announced: 2025-12-17
- Where: Iwakuni, Yamaguchi Prefecture, Japan, Japan
- Value: $7.00M (1.00B JPY)
- Starts operating: Q3 2026
- Status: announced
- Capacity: 3x current RO membrane capacity; 2x BC membrane capacity
- Products: hollow-fiber RO membrane 'Hollowsep', BC membrane for salt and lithium recovery
- Sectors: [Water Treatment Equipment](https://endata.com/sectors/water-treatment-equipment.md)

## Companies

- [Toyobo MC](https://endata.com/companies/74650.md)

## Sources

- [automation-news.jp](https://www.automation-news.jp/2025/12/99452/), 2025-12-17: "中東地域などで需要が拡大する中空糸型RO膜「ホロセップ」の生産能力を増強することを目的とし、紡糸ラインを増設し、生産能力を現行の3倍に引き上げる。"

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Data from Endata (https://endata.com/). Announcements are summarized from public sources and may be incomplete; check the linked originals.