Okuhida Onsen Allowing Tattoos

My partner and I would like to travel to Okuhida to experience the outdoor natural onsen. Does anyone know if there are Hot Springs around this area which allow tattoos? (he has both legs and chest, quite large)
We are white Australians so hoping for some leniency on the common rules.
Ideally these would be mixed gender so we can be together. We would prefer not to pay extra for a private onsen which may not be as large and magnificent.
We are travelling from Matsumoto and on to Hida Takayama, Shirakawa-Go and Kanazawa if there may be others along that route.

I would honestly just contact the onsen that you're thinking of going to. There are some that have no issue with it, though there are some which are more traditional and don't want people entering with tattoos (association with yakuza) and other negative thoughts about them.

you can of course ask, but honestly I haven't been in any onsen where tattoos are allowed (been in many). Ryokans need to consider local customers, who I think do not accept (or at least like) tattoos in onsen.
Your solution is private onsen .

There are a surprisingly large number of tattoo-friendly onsen throughout the country. I've visited bathing facilities all over the place without issue. Most people who do not have tattoos might not even realise they are in a tattoo-friendly onsen simply because they do not ask, and of course the obvious fact that the vast majority of Japanese people are not tattooed means that you are unlikely to see a tattoo even in a tattoo-friendly place. Japanese people in particular are often surprised to hear that I went to a particular onsen or sento and was allowed to bathe as a tattooed person. But the fact is they just never knew because it wasn't relevant information to them. There used to be a good site listing tattoo-friendly facilities but sadly it seems to be gone now. The best advice is just to contact the onsen directly and ask.

There is the one called Shinhotaka no yu which is the natural onsen in a wild, you need a donation for cleaning(300jpy or so) and nobody will stop you to enter, itfs mixed, outdoor, public onsen.
Or some ryokan such as Yarimi-man, Hodakado Yamano, Karukaya(google says temporarily closed, but u can ask) have the private baths which you do not need to care about your tattoo.

Hirayu no mori is tattoo friendly. Mixed is very rare nowadays if itfs a normal Onsen/sento. Ifve been to some in Kyushu.

Other than that youfll have to stick to gwildh ones like somebody else mentioned with the Shinhotaka one. Those will have no facilities and are just a hot pool somewhere and of course there might be other nude people

Thanks so much everyone for your helpful answers to this thread. The onsen where we ended up staying (Okuhida Garden Hotel - with mixed outdoor onsen) did not mind on the days we were there two weeks ago. It was a shoulder season so not sure if I should promote them as tattoo friendly in case they were just making an exception due to it not being busy (and several other tourists with tats who were already inside when we arrived). It was a great experience and I think it's nice that this thread has options for others with the same question. I'll have to go back to Japan to visit more, the wild ones sound amazing!

Hirayu no mori is tattoo friendly. Mixed is very rare nowadays if itfs a normal Onsen/sento. Ifve been to some in Kyushu.

Other than that youfll have to stick to gwildh ones like somebody else mentioned with the Shinhotaka one. Those will have no facilities and are just a hot pool somewhere and of course there might be other nude people