Hey all!
I’m back again with another shamisen-related problem
My new nagauta shamisen has been sitting in my room, partially abandoned, as I travelled around Japan. I just got back today, and I’ve just finished assembling it. It came with everything except for a doukake. I thought that it wouldn’t be a problem, since my last nagauta shamisen came with extra doukakes. But to my huge surprise, none of the spares fit. It’s not a minor sizing variation that can be fixed with a bit of gentle force - the doukakes are significantly smaller than the dou of my new nagauta. The dou of my new nagauta is a few millimetres longer and almost a centimetre thicker than my that of my old nagauta.
I’ve done a bit of reading and have acquainted myself somewhat with 部大 sizes (五厘, 二分大 etc, although I honestly am still not sure which one my new nagauta falls under - a bit of help would be appreciated). But 部大 sizes don’t address the thickness issue - why does the height (when laid flat) of my new nagauta’s dou differ so much from that of my old nagauta’s dou? And what search terms do I enter to find an appropriate doukake for my new nagauta?
(Amateur) Measurements of my new nagauta’s dou:
Top to bottom: 19.7cm
Left to right: 17.8cm
Thickness: 8.8cm [approximately - I’m not sure whether to measure this as a straight line (aka height) or to follow the curvature]
If anyone has any ideas on where I could get more information on this, I would greatly appreciate it! I know that dous’ lengths and widths are more or less standardized, but does anyone else’s shamisens have such large variations in dou thickness?
Cheers,
Yvonne
P.S. I’m calling both old and new shamisens ‘nagauta’ since they both have the trademark curving hatomune, but if I’m mistaken and my new shamisen isn’t a nagauta shamisen, do let me know!

Your doukake is beautiful! I’ll definitely make my own doukake if nothing else works, but I’m not the most artistically inclined, which means I’ll probably end up stabbing through my shamisen’s skin with a pair of scissors SOMEHOW. (There’s actually a precedent. I sliced right through my newly bought kimono while trying to cut the shipping box open, so…yeah). For now, I’m going to make a trip to Kameya and physically lug my shamisen over so that I can test the doukake sizing before I buy~
If it is not repairable, maybe you could use the material for your doukake? I have looked for a while for a doukake that I liked and was disappointed with the selection available. So I am making my own as well.