Mono Boost Transformer SUT-02 of Yamamoto Acoustic Craft is for low impedance MC cartridges,
While embarrassed, I did not know the existence of the high impedance version of SUT-03 and I did not know until recently.
SUT-03 is also a wonderful performance similar to SUT-02.
The impedance of the cartridge that matches SUT-03 is 5 to 40Ω, and its amplification factor is 10-fold.
Please try it.