に (passive agent)
grammar39 sentences
The particle に used to mark the agent ('by whom') of a passive verb — 先生に褒められた ('was praised by the teacher'), 犬に噛まれた ('was bitten by a dog'), 母親に育てられる ('be raised by one's mother'), 友達に呼ばれた ('was called by a friend'). に is the standard passive-agent marker; によって is the formal/written alternative for inanimate or institutional agents (法律によって禁止されている), and で or から can appear with a source-oriented nuance for some verbs.