I've been sewing on Janome exclusively for 7 or 8 years. I find it a good deal to purchase the Janome pre-wound and then use the bobbins for other colors when they are empty.
Janome bobbins have a "j" imprinted on them. They sell pre-wound in black and white and can be found online and in the sewing machine store. I stick to the J bobbins except I have purchased the Superior pre-wound size 15 (plastic - not paper) and have had no problems. I haven't used a lot of them, but enough that I don't worry about purchasing more.
Superior sells "try me" thread that will allow you to purchase just a few bobbins to test on your machine.
Last edited by Sheri.a; 03-08-2019 at 08:17 PM.