Use Google "Ϊͺ Ώi" and "\Η Ώi".
Shakuhachi : Ϊͺ
Nohkan : \Η (not "Nohken")
price : Ώi(kakaku)
vX`bN is "plastic" model, it is just for beginners.
Both used(Γ:chuuko) stocks are not so many, finding very hard usual.
(Shakuhachi players is more than Noh.)
Although it can be seen in Net auctions and Net flea markets,
but in that case you can not confirm the condition perfectly, so no recommend.
Make player friends at SNS(FB or music or JP culture forum) may fastest to find good one.
Although it can be seen in the "real" flea market or antique market,
it will not be useless as it is not everytime.
"Shakuhachi lesson class(Ϊͺ³Ί : -kyoshitsu)" is not so rare.
(Also use Google images)
This is DIY Shakuhachi workshop(1000Y, amazing price) report in Yanaka, Tokyo,
but published date is in 2014, not sure still doing possible or not.https://rocketnews24.com/2014/11/11/507782/https://www.facebook.com/RSbambooWAY
If you do not mind the price of new one, you do not have to worry, though.
Again, already mentioned above, Noh players is limited, very harder even if finding Noh group.
In country side some small local commuties also playing very long years.http://www.the-noh.com/jp/link.html
This is one of Japanese instruments(=ayν : wagakki) shop link. (not opened all)http://www.the-noh.com/jp/link.htmlhttp://www.wagakki-fan.com/
(Μ : hanbai = sales shop, § means postal code icon)
If go to Tokyo, town Ochanomizu(δm
) is the biggest
instruments shops(world wide items collected) gethered in Japan.https://pathee.com/region/tokyo/ochanomizu/gakki.html
World famous players abroad are also visiting, very famous.
This is amature guitar players report.https://youtu.be/bKqDEAHW0JM