為に

ために

Conjunction, word usually written using kana alone

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為にするためにする

to have an ulterior motive; to have an axe to grind

為になるためになる

to be of benefit; to be beneficial; to be useful; to do one good; to be good for one

となるために

in order to be(come)...

自分のためにじぶんのために

for oneself; for one's own sake; on one's own account

誰がためにたがために

for whom