fe.settings:getUserBoardSettings - non array given[kc] - Endchan Magrathea
 >>/52359/
> Otto von Bismark オットー・フォン・ビスマルク.
> フォン is the von part with フ being fu and so von is spelt like fuon.
Because the German letter v fau stands for the sound f. So quite rightly the Japanese use f.
One thing that have to keep in mind, we are writing about sounds and not letters. Live speech and not written. As an Anglo you must very well know how much the two can differ.
Letters are consensus on how to represent sounds on paper (on wood, stone, steel, any recording material).