Which preposition to use with samurai

in Occurrences 2%

Disturb it not with speech; but let it work alone in quietness and secrecy,"writes a young samurai in his diary.

about Occurrences 1%

But, as in religious monomania there is something touchingly noble, as compared with the delirium tremens of a drunkard, so in that extreme sensitiveness of the samurai about their honor do we not recognize the substratum of a genuine virtue?

to Occurrences 1%

For causes entirely incompatible with reason, or for reasons entirely undeserving of death, hot headed youths rushed into it as insects fly into fire; mixed and dubious motives drove more samurai to this deed than nuns into convent gates.

Which preposition to use with  samurai