Jon from JKI made a post about that awhile back, I'll see if I can drag it up.
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Edit: Looks like it was Dave:
"100/0 (single bevel) yanagiba, usuba, etc
90/10 (double bevel) honesuki, garasuki, etc
80/20 , 70/30, 60/40 (double bevel) gyuto, nakiri, sujihiki, etc
50/50...