Hi Alex, nowadays it’s like walking in a minefield….great many repros/fakes of varying quality from pretty good to pretty awful.
Also many modern pieces being made in Japan apparently from a process that takes moulds from original items and then recasts ( many of these are solid whereas good Meiji bronzes are hollow and often rattle inside a bit which might sound bizarre but true!)
There are many fakes of Samurai, plain or partially gilt, monkeys, birds of prey, koro…..the list goes on and on. Some made in Japan, some China and probably elsewhere.
Its just like swords…..you simply have to develop the “eye” based on handling many genuine things.
Alloys used in genuine pieces can vary a lot as well and patina can be equally variable in colour.
It comes down to being able to recognise artistry, quality of casting, quality of subsequent finishing (carving, gilding, patination etc)
Some makers are obvious….Seiya, Miyao, Maruki, but again….there are fakes of these as well.
I dealt in Meiji bronzes for many years when good pieces were available but nowadays not so much good stuff surfaces.
99% of small bronze okimono for sale in the UK via UK auctions, especially things like insects, crustaceans, rats, creepy crawlies, scorpions, dragons are all fake (loosely in Meiji style). Even UK antique platforms (Selling Antiques and others) are littered with mostly fakes.
No easy answer……know your subject……caveat emptor.
Websites to look at…Kevin Page, Steve Sly (both personal friends and excellent trusted dealers) plus of course Bonhams. Malcolm Fairley and Grace Tsumugi probably have pieces on their websites also.
Happy to look at anything you are thinking about.
Best.
Colin