>>7612762
style is the product of exactly 2 properties: proportion and discretion of detail.
anime and manga studios developed effective reductions on strong anatomical bases and adjusted proportions for audience appeal. production constraints in time and funding further inform these decisions.
there is no magic here: many western styles can achieve a similar look and feel through a process of detail decision and proportion adjustment.
see pic related: the example isn't perfect by any means, but it shows how powerful simply knowing what details to add or remove can completely change the look of a piece; the woman's face on the right was made simply by erasing details, with the sole exception of increasing the size of her eyes vertically via lasso transform (hence, proportion)
"detail discretion" can be further explored through shape, line thickness, hatching and texture technique, the choice of whether to render halftone, and many more ways. this choice is usually dictated through your choice of medium (ink, charcoal, watercolor, digital, etc)