I have no idea about those cartridges but being somewhat expert on Japanese woodworking tools, the Japanese tend to hoard the best stuff for themselves. They export the second grade stuff. To get a decent hand made dozuki you have to know someone in Japan to get it for you. It would not surprise me at all if Japanese home market cartridges are superior in some way to the ones they send us.
Otono-Edison MC cartridges
As you may know the Miyajima is an export brand of Otono-Edison.
There is a line of Otono-Edison cartridges for Japanese market only.
Otono-Edison cartridge like "Standard Mature Wood" and just a "Mature Wood" updated with Skillfull and Technique model as I can see on the original Japanese site on needle replacement page (from the manufacturer).
The Mature Studio BE/SW equal to famous Miyajima Shilabe.
However, I need a manual for Otono-Edison Standard Mature Wood MC which is no longer in the list of cartridges here ***
Anyone can help with info about Standard Mature Wood cartridge ?
There is a line of Otono-Edison cartridges for Japanese market only.
Otono-Edison cartridge like "Standard Mature Wood" and just a "Mature Wood" updated with Skillfull and Technique model as I can see on the original Japanese site on needle replacement page (from the manufacturer).
The Mature Studio BE/SW equal to famous Miyajima Shilabe.
However, I need a manual for Otono-Edison Standard Mature Wood MC which is no longer in the list of cartridges here ***
Anyone can help with info about Standard Mature Wood cartridge ?