The 005 pens aren`t actually .005 - they`re 0.20.
I don`t actually have any of the Micron brand, but I do have multiple pens inside that range - the finest being 0.15. Japan seems to have a larger variety of fine pens than I`ve seen elsewhere.
But I never use them for inking - only writing. For inking it`s a G-pen or if I`m in a hurry a sign pen (brush tip).