I didn't like that answer so I did some more research. (Bearing in mind my Legend is 20 years old and I'm not made of money).
Mannol claim that their 'MANNOL O.E.M. 8218 Multivehicle JWS' product 'Corresponds with requirements / specifications / products' including "HONDA ATF-Z1 (not for CVT) / ATF DW-1". It also suits a lot of other Japanese specs too according to the list.
https://mannol.de/en/?action=accessory_chemical_preview&name=O.E.M. 8218 Multivehicle JWS
Which is good enough for me, especially at £20 for 4 litres (eBay).
I did use Mannol stuff before on a Volvo I had that was fussy about power steering fluid, no issues and it's reasonably priced.