# Eisai

Source: https://onco.cc/companies/da-eisai/  
OnCo record `da-eisai` (Company). Data CC BY-NC 4.0, attribute "Data from OnCo (onco.cc)"; commercial use needs a licence.

## TL;DR

Eisai is a medicines company that co-developed lecanemab.

## Summary

Listed as the lecanemab sponsor partner on this atlas. Company pages here are map nodes, not investment advice.

## Fields

- Kind: Company
- Last checked: 2026-09-21
- Tags: dementia-atlas
- HQ: Tokyo
- Type: pharma
- Website: https://www.eisai.com/

## Sources

- Eisai: https://www.eisai.com/

## Connected records

- drugs: [Lecanemab](https://onco.cc/drugs/da-lecanemab/)
- trials: [CLARITY AD](https://onco.cc/trials/da-trial-clarity-ad/)
- diagnoses: [Alzheimer’s disease](https://onco.cc/diagnoses/alzheimers-disease/)

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JSON: https://onco.cc/api/v1/entities/da-eisai.json