# Tosoh Bioscience

Japanese bioseparation specialist (est. 1935, TSE: 4042) — TOYOPEARL Protein A, HIC, IEX, SEC resins; TSKgel HPLC columns; alkali-resistant Super A resin for antibody capture; leading Protein A resin supplier globally with low-ligand leaching performance.

Source: https://en.bioecon.ru/companies/tosoh-bioscience/
Updated: 2026-06-19

- Country: Japan
- Revenue: ~¥350B (Tosoh group)
- Employees: ~700 emp (biosci division)

## Verifiable facts

| Fact | Value | Source |
| --- | --- | --- |
| Revenue | ¥1,019.9 billion for fiscal year ending March 2026 | https://finance.biggo.com/news/jpx_tdnet_140120260512526548 |
| Capacity | 50,000 liters per year for process resins | https://www.tosohbioscience.com/US-EN-separations/service-and-support |
| Production site | Nanyo Complex in Shunan City, Yamaguchi Prefecture, Japan | https://www.nikkei.com/markets/ir/irftp/data/tdnr/tdnetg3/20260527/fy372v/140120260526548727.pdf, https://www.tosohbioscience.com/EU-EN-separations/service-and-support |
| Production site | Yokkaichi Complex in Yokkaichi City, Mie Prefecture, Japan | https://separations.eu.tosohbioscience.com/news/news-releases/2022/tosoh-to-increase-production-capacity-of-separation-and-purification-media, https://separations.eu.tosohbioscience.com/news/news-releases/2024/tosoh-expanding-separation-and-purification-media-production-with-new-manufacturing-facility |
| Headcount | 14,850 employees for the Tosoh Group as of March 31, 2026 | https://finance.biggo.com/news/jpx_tdnet_140120260512526548, https://www.nikkei.com/markets/ir/irftp/data/tdnr/tdnetg3/20260527/fy372v/140120260526548727.pdf |
| Regulatory approval | regulatory support files provided for submission to the FDA | https://www.tosohbioscience.com/EU-EN-separations/service-and-support, https://www.tosohbioscience.com/US-EN-separations/service-and-support |

Independent sources: finance.biggo.com, nikkei.com

## Technologies

- [Downstream Purification & Bioseparation](https://en.bioecon.ru/technology/downstream-purification-bioseparation/)